- Introduce a lazily initialized, shared aiosqlite connection stored in self._db and two asyncio locks (_db_lock, _operation_lock) for safe concurrent access
- Ensure the database directory exists before connecting and enable WAL journaling and foreign keys on first connect
- Add close method to gracefully close the persistent connection
- Guard initialization and write operations with _operation_lock to ensure single-threaded schema setup
- Switch to ON CONFLICT UPSERT for token_counts updates and initialize token_time_series table
- Add typing for _db (Optional[aiosqlite.Connection]) and adjust imports accordingly
addition: Frontend button with total stats aggregation task and feedback span element to keep user informed and a small database footprint
BREAKING CHANGE:
- new config.yaml config block
- new dependency: httpx-aiohttp for faster endpoint queries in bigger installations
- new dynamic dashboard
