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

src/timmy/thinking.py

@@ -88,8 +88,7 @@ def _get_conn(db_path: Path = _DEFAULT_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("""
         CREATE TABLE IF NOT EXISTS thoughts (
             id TEXT PRIMARY KEY,
             content TEXT NOT NULL,
@@ -97,8 +96,7 @@ def _get_conn(db_path: Path = _DEFAULT_DB) -> sqlite3.Connection:
             parent_id TEXT,
             created_at TEXT NOT NULL
         )
-        """
-    )
+        """)
     conn.execute("CREATE INDEX IF NOT EXISTS idx_thoughts_time ON thoughts(created_at)")
     conn.commit()
     return conn