chore: deprecate /api/v2/aibridge/interceptions endpoint (#24670)

*Disclaimer: implemented by a Coder Agent using Claude Opus 4.6*

Marks the `GET /api/v2/aibridge/interceptions` endpoint as deprecated in
favor of `/aibridge/sessions`, which provides richer session-level
aggregation including threads and agentic actions.

Changes:
- Add `@Deprecated` Swagger annotation to the endpoint handler
- Add deprecation notice to the
`codersdk.Client.AIBridgeListInterceptions` method
- Regenerated OpenAPI spec with `"deprecated": true` flag

The endpoint remains fully functional.

Fixes https://github.com/coder/internal/issues/1339

coderd/apidoc/docs.go

@@ -122,6 +122,7 @@ const docTemplate = `{
                 ],
                 "summary": "List AI Bridge interceptions",
                 "operationId": "list-ai-bridge-interceptions",
+                "deprecated": true,
                 "parameters": [
                     {
                         "type": "string",

coderd/apidoc/swagger.json

@@ -95,6 +95,7 @@
 				"tags": ["AI Bridge"],
 				"summary": "List AI Bridge interceptions",
 				"operationId": "list-ai-bridge-interceptions",
+				"deprecated": true,
 				"parameters": [
 					{
 						"type": "string",