backup

backend/app/db.py

@@ -145,7 +145,8 @@ CREATE TABLE scheduler_lock (
     pid INTEGER NOT NULL,
     hostname TEXT NOT NULL,
     created_at REAL NOT NULL,
-    heartbeat_at REAL NOT NULL
+    heartbeat_at REAL NOT NULL,
+    heartbeat_timeout REAL NOT NULL DEFAULT 300
 );
 """,
     5: """
@@ -253,7 +254,6 @@ CREATE INDEX IF NOT EXISTS idx_import_log_source_id_desc
 
 async def _configure_connection(db: aiosqlite.Connection) -> None:
     """Apply hardening pragmas to a newly-opened SQLite connection."""
-    await db.execute("PRAGMA journal_mode=WAL;")
     await db.execute("PRAGMA foreign_keys=ON;")
     await db.execute("PRAGMA busy_timeout=5000;")