Fix broken cross-links in kibana and elasticsearch hub pages

Surfaced by the new HubLinkValidator in docs-builder, which now routes
{hero}, {link-card}, and {whats-new} URLs through CrossLinkResolver.

kibana/v9.md:
- kibana://reference/kibana/... -> kibana://reference/...
  (kibana docset published its reference under reference/, not reference/kibana/)
- cloud://reference/cloud/cloud-hosted/... -> cloud://reference/cloud-hosted/...

elasticsearch/v9.md:
- Several elasticsearch://reference/X.md paths point to directory index
  pages and resolve as reference/X/index.md in the link index.
- Client docs live in their own repos and need scheme-specific cross-links:
    elasticsearch://reference/elasticsearch/clients/go/...
      -> go-elasticsearch://...
    elasticsearch://reference/elasticsearch/clients/java/...
      -> elasticsearch-java://...
    elasticsearch://reference/elasticsearch/clients/php.md
      -> elasticsearch-php://reference/index.md
    elasticsearch://reference/elasticsearch/clients/python.md
      -> elasticsearch-py://reference/index.md
    elasticsearch://reference/elasticsearch/clients/python/elasticsearch-dsl.md
      -> elasticsearch-py://reference/elasticsearch-dsl.md
    elasticsearch://reference/elasticsearch/clients/ruby/api.md
      -> elasticsearch-ruby://reference/api.md
    elasticsearch://reference/elasticsearch/clients/rust.md
      -> elasticsearch-rs://reference/index.md
    elasticsearch://reference/elasticsearch/clients/community.md
      -> elasticsearch://reference/community-contributed/index.md

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: florent-leborgne

products/elasticsearch/v9.md

@@ -180,7 +180,7 @@ links:
 
 :::{link-card}
 title: Other query languages
-link: elasticsearch://reference/query-languages.md
+link: elasticsearch://reference/query-languages/index.md
 description: Use EQL for event sequences, SQL for familiar syntax, or Painless for custom scoring and scripted queries.
 links:
   - label: EQL (Event Query Language)
@@ -211,31 +211,31 @@ aside:
   label: Aggregation families
   links:
     - label: Metric
-      url: elasticsearch://reference/aggregations.md
+      url: elasticsearch://reference/aggregations/index.md
     - label: Bucket
-      url: elasticsearch://reference/aggregations.md
+      url: elasticsearch://reference/aggregations/index.md
     - label: Pipeline
-      url: elasticsearch://reference/aggregations.md
+      url: elasticsearch://reference/aggregations/index.md
     - label: Matrix
-      url: elasticsearch://reference/aggregations.md
+      url: elasticsearch://reference/aggregations/index.md
 :::
 
 :::{link-card}
 title: Metric aggregations
-link: elasticsearch://reference/aggregations.md
+link: elasticsearch://reference/aggregations/index.md
 description: Compute single numeric values from field data — min, max, avg, sum, percentiles, stats, and more.
 links:
   - label: Top hits
     url: elasticsearch://reference/aggregations/search-aggregations-metrics-top-hits-aggregation.md
   - label: Top metrics
     url: elasticsearch://reference/aggregations/search-aggregations-metrics-top-metrics.md
   - label: Cardinality, percentiles, stats
-    url: elasticsearch://reference/aggregations.md
+    url: elasticsearch://reference/aggregations/index.md
 :::
 
 :::{link-card}
 title: Bucket and pipeline aggregations
-link: elasticsearch://reference/aggregations.md
+link: elasticsearch://reference/aggregations/index.md
 description: Group documents into buckets, then chain pipeline aggregations to compute on those buckets.
 links:
   - label: Filters aggregation
@@ -255,7 +255,7 @@ links:
 
 :::{link-card}
 title: Mapping
-link: elasticsearch://reference/elasticsearch/mapping-reference.md
+link: elasticsearch://reference/elasticsearch/mapping-reference/index.md
 description: Define how documents and their fields are stored, indexed, and analyzed.
 links:
   - label: Field data types
@@ -304,15 +304,15 @@ links:
 
 :::{link-card}
 title: Configuration reference
-link: elasticsearch://reference/elasticsearch/configuration-reference.md
+link: elasticsearch://reference/elasticsearch/configuration-reference/index.md
 description: All Elasticsearch node settings — network, thread pools, index defaults, security, and more.
 links:
   - label: Node settings
     url: elasticsearch://reference/elasticsearch/configuration-reference/node-settings.md
   - label: Security settings
     url: elasticsearch://reference/elasticsearch/configuration-reference/security-settings.md
   - label: All settings reference
-    url: elasticsearch://reference/elasticsearch/configuration-reference.md
+    url: elasticsearch://reference/elasticsearch/configuration-reference/index.md
 :::
 ::::
 
@@ -489,30 +489,30 @@ link: /reference/elasticsearch-clients.md
 description: Official Elasticsearch clients for your preferred programming language.
 links:
   - label: Python
-    url: elasticsearch://reference/elasticsearch/clients/python.md
+    url: elasticsearch-py://reference/index.md
   - label: Java
-    url: elasticsearch://reference/elasticsearch/clients/java/getting-started.md
+    url: elasticsearch-java://reference/getting-started.md
   - label: Go
-    url: elasticsearch://reference/elasticsearch/clients/go/using-the-api/dense-vectors.md
+    url: go-elasticsearch://reference/using-the-api/dense-vectors.md
   - label: Rust
-    url: elasticsearch://reference/elasticsearch/clients/rust.md
+    url: elasticsearch-rs://reference/index.md
   - label: PHP
-    url: elasticsearch://reference/elasticsearch/clients/php.md
+    url: elasticsearch-php://reference/index.md
   - label: Ruby
-    url: elasticsearch://reference/elasticsearch/clients/ruby/api.md
+    url: elasticsearch-ruby://reference/api.md
   - label: Community clients
-    url: elasticsearch://reference/elasticsearch/clients/community.md
+    url: elasticsearch://reference/community-contributed/index.md
 :::
 
 :::{link-card}
 title: Python DSL and helpers
-link: elasticsearch://reference/elasticsearch/clients/python/elasticsearch-dsl.md
+link: elasticsearch-py://reference/elasticsearch-dsl.md
 description: High-level Python libraries that simplify building queries, mappings, and bulk operations.
 links:
   - label: Elasticsearch DSL (Python)
-    url: elasticsearch://reference/elasticsearch/clients/python/elasticsearch-dsl.md
+    url: elasticsearch-py://reference/elasticsearch-dsl.md
   - label: Java bulk indexing
-    url: elasticsearch://reference/elasticsearch/clients/java/usage/indexing-bulk.md
+    url: elasticsearch-java://reference/usage/indexing-bulk.md
   - label: Troubleshoot clients
     url: /troubleshoot/elasticsearch/clients.md
 :::
@@ -525,7 +525,7 @@ links:
   - label: Fleet and Elastic Agent
     url: /reference/fleet.md
   - label: Content connectors
-    url: elasticsearch://reference/search-connectors.md
+    url: elasticsearch://reference/search-connectors/index.md
   - label: All ingest options
     url: /manage-data/ingest.md
 :::
@@ -537,7 +537,7 @@ links:
 
 :::{link-card}
 title: REST APIs
-link: elasticsearch://reference/elasticsearch/rest-apis.md
+link: elasticsearch://reference/elasticsearch/rest-apis/index.md
 description: Conventions, common options, compatibility guarantees, and the full interactive API specification.
 links:
   - label: API conventions

products/kibana/v9.md

@@ -210,19 +210,19 @@ links:
 
 :::{link-card}
 title: Alerting connectors
-link: kibana://reference/kibana/connectors-kibana/alerting-cases-connectors.md
+link: kibana://reference/connectors-kibana/alerting-cases-connectors.md
 description: Send alerts and case updates to external incident-management tools.
 links:
   - label: Jira
-    url: kibana://reference/kibana/connectors-kibana/jira-action-type.md
+    url: kibana://reference/connectors-kibana/jira-action-type.md
   - label: ServiceNow ITSM
-    url: kibana://reference/kibana/connectors-kibana/servicenow-action-type.md
+    url: kibana://reference/connectors-kibana/servicenow-action-type.md
   - label: PagerDuty
-    url: kibana://reference/kibana/connectors-kibana/pagerduty-action-type.md
+    url: kibana://reference/connectors-kibana/pagerduty-action-type.md
   - label: Slack
-    url: kibana://reference/kibana/connectors-kibana/slack-action-type.md
+    url: kibana://reference/connectors-kibana/slack-action-type.md
   - label: Webhook
-    url: kibana://reference/kibana/connectors-kibana/webhook-action-type.md
+    url: kibana://reference/connectors-kibana/webhook-action-type.md
 :::
 ::::
 
@@ -249,15 +249,15 @@ links:
 
 :::{link-card}
 title: Gen-AI connectors
-link: kibana://reference/kibana/connectors-kibana/gen-ai-connectors.md
+link: kibana://reference/connectors-kibana/gen-ai-connectors.md
 description: Wire Kibana up to LLM providers for use in Agent Builder, alerting summaries, and AI Assistant features.
 links:
   - label: OpenAI
-    url: kibana://reference/kibana/connectors-kibana/openai-action-type.md
+    url: kibana://reference/connectors-kibana/openai-action-type.md
   - label: Amazon Bedrock
-    url: kibana://reference/kibana/connectors-kibana/bedrock-action-type.md
+    url: kibana://reference/connectors-kibana/bedrock-action-type.md
   - label: Google Gemini
-    url: kibana://reference/kibana/connectors-kibana/gemini-action-type.md
+    url: kibana://reference/connectors-kibana/gemini-action-type.md
 :::
 
 :::{link-card}
@@ -436,11 +436,11 @@ links:
 
 :::{link-card}
 title: Console
-link: cloud://reference/cloud/cloud-hosted/ec-api-console.md
+link: cloud://reference/cloud-hosted/ec-api-console.md
 description: Run Elasticsearch and Kibana API requests interactively, with auto-complete and history.
 links:
   - label: Console overview
-    url: cloud://reference/cloud/cloud-hosted/ec-api-console.md
+    url: cloud://reference/cloud-hosted/ec-api-console.md
 :::
 
 :::{link-card}
@@ -466,9 +466,9 @@ links:
   - label: Kibana serverless API
     url: https://www.elastic.co/docs/api/doc/serverless-kibana
   - label: Plugins
-    url: kibana://reference/kibana/kibana-plugins.md
+    url: kibana://reference/kibana-plugins.md
   - label: kibana-setup command
-    url: kibana://reference/kibana/commands/kibana-setup.md
+    url: kibana://reference/commands/kibana-setup.md
 :::
 ::::
 
@@ -478,21 +478,21 @@ links:
 
 :::{link-card}
 title: Configuration and settings
-link: kibana://reference/kibana/configuration-reference.md
+link: kibana://reference/configuration-reference.md
 description: All kibana.yml settings and UI-configurable advanced settings.
 links:
   - label: General
-    url: kibana://reference/kibana/configuration-reference/general-settings.md
+    url: kibana://reference/configuration-reference/general-settings.md
   - label: Alerting
-    url: kibana://reference/kibana/configuration-reference/alerting-settings.md
+    url: kibana://reference/configuration-reference/alerting-settings.md
   - label: Security
-    url: kibana://reference/kibana/configuration-reference/security-settings.md
+    url: kibana://reference/configuration-reference/security-settings.md
   - label: Reporting
-    url: kibana://reference/kibana/configuration-reference/reporting-settings.md
+    url: kibana://reference/configuration-reference/reporting-settings.md
   - label: Monitoring
-    url: kibana://reference/kibana/configuration-reference/monitoring-settings.md
+    url: kibana://reference/configuration-reference/monitoring-settings.md
   - label: Advanced settings (UI)
-    url: kibana://reference/kibana/advanced-settings.md
+    url: kibana://reference/advanced-settings.md
 :::
 
 :::{link-card}