- Add structured logging with zap library (internal/utils/logger.go)
- Support for Debug, Info, Warn, Error, Fatal log levels
- JSON format for file logs, console format for stdout
- Logs written to .onx/logs/onx.log
- Configurable log levels and output modes
- Create comprehensive error types (internal/errors/errors.go)
- OnyxError struct with Code, Message, Cause, and Hint fields
- Error codes for all major error categories
- Helper constructors for common errors
- Recovery hints for better user experience
- Add panic recovery mechanisms to daemon (internal/daemon/daemon.go)
- Wrap main event loop with panic recovery
- Graceful degradation on partial failures
- Detailed error logging with stack traces
- Recovery wrapper for snapshot creation
- Replace standard log package with structured logging
This implements items 44-46 from the checklist.
