fix: clean up root endpoint and disable redoc

- Simplify root endpoint to return minimal status info
- Remove obsolete endpoint listings (moved to /docs)
- Clean up verbose app description
- Disable redoc UI

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/controllers/health_controller.py

@@ -52,20 +52,7 @@ class HealthController(BaseController):
                 "service": settings.app_name,
                 "version": settings.app_version,
                 "status": "healthy",
-                "documentation": {
-                    "swagger_ui": "/docs",
-                    "redoc": "/redoc",
-                    "openapi_spec": "/openapi.json"
-                },
-                "endpoints": {
-                    "chat_completions": "/v1/chat/completions",
-                    "models": "/v1/models",
-                    "conversations": "/v1/conversations",
-                    "dns_lookup": "/tools/dns/lookup",
-                    "infrastructure": "/infrastructure",
-                    "health": "/health",
-                    "health_full": "/health/full"
-                }
+                "docs": "/docs"
             }
 
         @router.get(