- Updated exception handling across multiple files to specify Exception type, enhancing clarity and maintainability.
- Renamed several route handler functions in meshchat.py for better readability and consistency.
- Added noqa comments to suppress linting warnings for specific lines in database.py and other files.
- Incremented database version to 6 and added 'is_spam' column to LxmfMessage model.
- Introduced BlockedDestination and SpamKeyword models for managing blocked destinations and spam keywords.
- Added API endpoints for managing blocked destinations and spam keywords, including create, read, and delete operations.
- Enhanced message handling to mark messages as spam based on keywords and block messages from blocked sources.
