V1.0.3

Fixed

• Database corruption prevention: added PRAGMA wal_checkpoint(TRUNCATE) on app exit via RunEvent::ExitRequested handler, ensuring WAL data is properly merged into the main database file before shutdown
• create_media and update_media: wrapped all 3 operations (media insert/update + genre linking + credit linking) in a single atomic transaction instead of separate unchecked transactions, preventing partial writes if one step fails
• switch_profile: lock file is now acquired for the new profile BEFORE updating the manifest, preventing an inconsistent state where the manifest says profile B is active but the connection is still on profile A
• switch_profile: WAL checkpoint on the old connection before swapping to the new profile's database

Added

• Lock file (logia.db.lock) using Windows LockFile API to prevent two instances of Logia from using the same profile database simultaneously. Lock is acquired at startup and on profile switch, with RAII cleanup on exit.
• GFS (Grandfather-Father-Son) automatic database backup: creates a daily copy of logia.db in backups/ on app startup and on profile switch. Rotation keeps 7 daily, 4 weekly, and 12 monthly backups, deleting older ones automatically.

Changed

• genres::link_to_media and people::link_to_media: removed inner unchecked_transaction since callers (create_media/update_media) now wrap operations in a global transaction
• Backup rotation: weekly grouping now uses (year, week) instead of week alone to avoid cross-year collisions
• Backup rotation: monthly retention now uses calendar date comparison instead of age_days <= 365 for precise 12-month retention