- Remove unused share_google_calendar function
- Add centralized log_operation for consistent logging with context
- Add get_timestamps helper for Phase 4 timestamp handling
- Consolidate safe_* functions into generic safe_advoware_operation
- Optimize reload functions to handle initial fetches
- Split standardize_appointment_data into parse_times, adjust_times, build_notiz helpers
- Use state dict for better encapsulation in handler