- Introduce new `skip_processed_files` option for transfer configurations
- Add database migration to support the new column
- Update config form and UI to include skip processed files toggle
- Enhance scheduler to respect skip processed files setting
- Modify file processing logic to optionally skip previously processed files
- Add environment variable support for skip processed files configuration
- Update config_form.templ to include form fields for new storage types
- Modify db.go to support generating rclone configs for WebDAV, NextCloud, OneDrive, and Google Drive
- Add migration to include new cloud storage fields in transfer_configs table
- Update migrations.go to include new cloud storage migration
- Replace mattn/go-sqlite3 with glebarez/sqlite for better cross-platform compatibility
- Add gormigrate for database migration support
- Update go.mod and go.sum with new dependencies
- Modify database initialization to use the new SQLite driver
- Ignore compiled binary in .gitignore