fix: Log full stack trace for unexpected errors

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>

main.py

@@ -189,8 +189,8 @@ async def main():
             logging.error(f"Container '{settings.NAVIDROME_CONTAINER}' not found.")
         else:
             logging.error(f"Error connecting to Docker or getting container: {e}")
-    except Exception as e:
-        logging.error(f"An unexpected error occurred: {e}")
+    except Exception:
+        logging.exception("An unexpected error occurred")
     finally:
         if docker:
             await docker.close()