* Enhance logging system and add tail_log operation

- Updated logging configuration to support custom log directories and filenames.
- Introduced `tail_log` operation for reading recent log entries from upstream servers, aiding in debugging.
- Improved log structure and content for better traceability of MCP server interactions.
- Adjusted CLI commands and documentation to reflect new logging features and configurations.

* Add GetLogDir method to ServerInterface and implement log directory handling

- Introduced GetLogDir method in ServerInterface for retrieving the log directory path.
- Implemented GetLogDir in Server to return configured log directory or default paths.
- Updated tray application to include functionality for opening the logs directory.
- Enhanced error handling and logging for directory access operations.

* Update log file references from 'mcpproxy.log' to 'main.log' across workflows and internal logging configurations

* Update README and workflow documentation for system tray flag usage; clarify command-line options for enabling/disabling system tray functionality.

* Refactor logging levels in logger.go to use constants for improved readability and maintainability

Added detailed Docker recovery section to README with:

**Content Added**:
- Docker Recovery overview section
- Key features (auto-detection, reconnection, notifications, cleanup)
- How It Works (5-step process flow)
- Notifications table (all recovery events)
- Troubleshooting guide with common issues:
  * Servers don't reconnect after recovery
  * Containers not cleaned up on shutdown
  * Recovery taking too long

**Location**:
- Added after Docker Isolation section, before OAuth section
- Includes code examples and commands for debugging
- Cross-references system tray Force Reconnect feature

**Testing**:
- All builds pass ✅
- Documentation follows existing README format
- Code examples tested and verified

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>