🧹 [Code Health] Fix silent exceptions in SmartMemory by using proper logging

[dioncx]

Replaced all instances of except Exception: pass with except Exception as e: logger.warning(...) in json_memory/smart.py.

🎯 What: Replaced anti-patterns of silently swallowing generic exceptions (except Exception: pass) with standard logging to capture error visibility.
💡 Why: Catching Exception blindly makes debugging very difficult because errors related to state persistence, file permission issues, serialization failures, or backwards compatibility issues fail without any noise. Logging these failures ensures they are observable without breaking the fallback mechanisms designed into the program flow.
✅ Verification:

• Ran the full pytest suite ensuring all tests passed.
• Kept all existing fallback behaviours intact (e.g. self._episodes = [] on failures) so the code's functional logic is unchanged.
• Ensured standard PEP 8 imports formatting for the logging module.
  ✨ Result: A more maintainable and debuggable codebase.

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PR created automatically by Jules for task 15456213792516027819 started by @dioncx

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