feat: enable SQLite WAL mode for all databases (AGI ticket #1) (#153)

src/swarm/task_queue/models.py

@@ -29,8 +29,9 @@ def _ensure_db() -> sqlite3.Connection:
     DB_PATH.parent.mkdir(parents=True, exist_ok=True)
     conn = sqlite3.connect(str(DB_PATH))
     conn.row_factory = sqlite3.Row
-    conn.execute(
-        """
+    conn.execute("PRAGMA journal_mode=WAL")
+    conn.execute("PRAGMA busy_timeout=5000")
+    conn.execute("""
         CREATE TABLE IF NOT EXISTS tasks (
             id TEXT PRIMARY KEY,
             title TEXT NOT NULL,
@@ -43,8 +44,7 @@ def _ensure_db() -> sqlite3.Connection:
             created_at TEXT DEFAULT (datetime('now')),
             completed_at TEXT
         )
-    """
-    )
+    """)
     conn.commit()
     return conn