Claude Code: Verify /metrics endpoint - add enhanced error logging

- Confirmed psutil==6.1.1 in requirements.txt
- Confirmed /metrics endpoint properly registered with FastAPI
- Added exc_info=True to error logging for full traceback on failures
- All error handling paths verified and working

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app.py

@@ -75,6 +75,7 @@ def get_app():
         try:
             import psutil
         except ImportError:
+            logger.error("psutil not installed - metrics unavailable")
             return JSONResponse(
                 status_code=503,
                 content={"error": "psutil not installed", "message": "System metrics unavailable"}
@@ -101,7 +102,7 @@ def get_app():
                 }
             }
         except Exception as e:
-            logger.error(f"Error collecting metrics: {e}")
+            logger.error(f"Error collecting metrics: {e}", exc_info=True)
             return JSONResponse(
                 status_code=500,
                 content={"error": "Failed to collect metrics", "message": str(e)}