fix(db): apply abspath to logged path in _safe_url() (#148)

Without this, _safe_url() could log a relative path while the actual
connection uses the absolute one (resolved in _build_database_url).

Author: GeiserX

src/db/base.py

@@ -204,6 +204,7 @@ def _safe_url(self) -> str:
             if not db_path:
                 backup_path = os.getenv("BACKUP_PATH", "/data/backups")
                 db_path = os.path.join(backup_path, "telegram_backup.db")
+            db_path = os.path.abspath(db_path)
             return f"sqlite+aiosqlite:///{db_path}"
         # PostgreSQL — build from non-sensitive env vars, mask password
         host = os.getenv("POSTGRES_HOST", "localhost")