feat: add PRAGMA synchronous=NORMAL to database connection setup

receipts.py

@@ -37,6 +37,7 @@ def __init__(
         for _ in range(self.connection_pool_size):
             conn = sqlite3.connect(self.db_path, check_same_thread=False)
             conn.execute("PRAGMA journal_mode=WAL")
+            conn.execute("PRAGMA synchronous=NORMAL")
             conn.execute("PRAGMA busy_timeout=5000")  # 5 second timeout
             self.pool.put(conn)