refactor: enhance error handling with structured logging across multiple modules

- Updated various modules including cli.py, run_agent.py, gateway, and tools to replace silent exception handling with structured logging.
- Improved error messages to provide more context, aiding in debugging and monitoring.
- Ensured consistent logging practices throughout the codebase, enhancing traceability and maintainability.

tools/tts_tool.py

@@ -122,8 +122,8 @@ def _convert_to_opus(mp3_path: str) -> Optional[str]:
         )
         if os.path.exists(ogg_path) and os.path.getsize(ogg_path) > 0:
             return ogg_path
-    except Exception:
-        pass
+    except Exception as e:
+        logger.warning("ffmpeg OGG conversion failed: %s", e)
     return None