Add openrouter conversation component

Signed-off-by: Joni Collinge <jonathancollinge@live.com>

Author: jjcollinge

daprdocs/content/en/reference/components-reference/supported-conversation/openrouter.md

@@ -0,0 +1,47 @@
+---
+type: docs
+title: "OpenRouter"
+linkTitle: "OpenRouter"
+description: Detailed information on the OpenRouter conversation component
+---
+
+## Component format
+
+A Dapr `conversation.yaml` component file has the following structure:
+
+```yaml
+apiVersion: dapr.io/v1alpha1
+kind: Component
+metadata:
+  name: openrouter
+spec:
+  type: conversation.openrouter
+  metadata:
+  - name: key
+    value: "mykey"
+  - name: model
+    value: openai/gpt-4o-mini
+  - name: cacheTTL
+    value: 10m
+```
+
+{{% alert title="Warning" color="warning" %}}
+The above example uses secrets as plain strings. It is recommended to use a secret store for the secrets, as described [here]({{% ref component-secrets.md %}}).
+{{% /alert %}}
+
+## Spec metadata fields
+
+| Field              | Required | Details | Example |
+|--------------------|:--------:|---------|---------|
+| `key`   | Y | API key for OpenRouter. Obtain one at [openrouter.ai/keys](https://openrouter.ai/keys). | `"sk-or-v1-..."` |
+| `model` | N | Model identifier in `provider/model-name` format. Any model supported by OpenRouter is valid (e.g. `openai/gpt-4o`, `anthropic/claude-3-5-sonnet`, `meta-llama/llama-3.3-70b-instruct`). Defaults to `openai/gpt-4o-mini`. Can also be configured via the `OPENROUTER_MODEL` environment variable. | `anthropic/claude-3-5-sonnet` |
+| `endpoint` | N | Override the OpenRouter API base URL. Useful when routing through a proxy. Defaults to `https://openrouter.ai/api/v1`. | `https://openrouter.ai/api/v1` |
+| `cacheTTL` | N | Time-to-live for the in-memory response cache. When set, identical requests are served from cache until they expire. Uses Go duration format. | `10m` |
+| `siteURL` | N | Your application URL. Forwarded as the `HTTP-Referer` header on every request. Optional but recommended so OpenRouter can attribute usage and include your app in public rankings. | `https://myapp.example.com` |
+| `siteTitle` | N | Your application name. Forwarded as the `X-Title` header on every request. Optional but recommended for OpenRouter attribution. | `My Dapr App` |
+
+## Related links
+
+- [Conversation API overview]({{% ref conversation-overview.md %}})
+- [OpenRouter documentation](https://openrouter.ai/docs)
+- [OpenRouter models](https://openrouter.ai/models)

daprdocs/data/components/conversation/generic.yaml

@@ -33,6 +33,11 @@
   state: Alpha
   version: v1
   since: "1.16"
+- component: OpenRouter
+  link: openrouter
+  state: Alpha
+  version: v1
+  since: "1.18"
 - component: Local echo
   link: local-echo
   state: Stable