feat: enable OpenTelemetry via shared observability fragment

Add gh-aw-fragments/observability.md that configures OTLP to export
workflow spans when GH_AW_OTEL_ENDPOINT and GH_AW_OTEL_AUTHORIZATION
secrets are available. Import the fragment in all 57 GitHub agentic
workflow .md files and regenerate all lock files.

Author: Copilot

.github/workflows/agent-deep-dive.lock.yml

@@ -3,6 +3,7 @@ inlined-imports: true
 name: "Internal: Agent Deep Dive"
 description: "Deep dive a specific agent workflow's recent runs to understand behavior and surface detailed recommendations"
 imports:
+  - gh-aw-fragments/observability.md
   - gh-aw-fragments/elastic-tools.md
   - gh-aw-fragments/runtime-setup.md
   - gh-aw-fragments/formatting.md

.github/workflows/agent-deep-dive.md

@@ -3,6 +3,7 @@ inlined-imports: true
 name: "Internal: Agent Efficiency"
 description: "Analyze agent workflow logs for inefficiencies, errors, and prompt improvement opportunities"
 imports:
+  - gh-aw-fragments/observability.md
   - gh-aw-fragments/elastic-tools.md
   - gh-aw-fragments/runtime-setup.md
   - gh-aw-fragments/formatting.md

.github/workflows/agent-efficiency.lock.yml

@@ -3,6 +3,7 @@ inlined-imports: true
 name: "Agent Suggestions"
 description: "Suggest new agent workflows based on repo needs and downstream activity"
 imports:
+  - gh-aw-fragments/observability.md
   - gh-aw-fragments/elastic-tools.md
   - gh-aw-fragments/runtime-setup.md
   - gh-aw-fragments/formatting.md

.github/workflows/agent-efficiency.md

@@ -3,6 +3,7 @@ inlined-imports: true
 name: "Autonomy Atomicity Analyzer"
 description: "Find patterns that block concurrent development by multiple agents or developers"
 imports:
+  - gh-aw-fragments/observability.md
   - gh-aw-fragments/elastic-tools.md
   - gh-aw-fragments/runtime-setup.md
   - gh-aw-fragments/formatting.md

.github/workflows/gh-aw-agent-suggestions.lock.yml

@@ -2,6 +2,7 @@
 inlined-imports: true
 description: "Analyze failed branch CI runs and create or update a tracking issue"
 imports:
+  - gh-aw-fragments/observability.md
   - gh-aw-fragments/elastic-tools.md
   - gh-aw-fragments/runtime-setup.md
   - gh-aw-fragments/formatting.md