Add formatting and type checks

karldns/store/__init__.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import threading
+from collections.abc import Iterator
 from contextlib import contextmanager
 from pathlib import Path
 from sqlite3 import Connection
@@ -31,7 +32,7 @@ class DdnsStore(AccountsMixin, MetricsMixin, RecordsEventsMixin, RateLimitCleanu
         self._init_db()
 
     @contextmanager
-    def connect(self):
+    def connect(self) -> Iterator[Connection]:
         conn = self._thread_connection()
         try:
             yield conn