Add formatting and type checks

karldns/store/metrics.py

@@ -2,8 +2,10 @@ from __future__ import annotations
 
 from datetime import UTC, datetime
 
+from .base import StoreConnectionMixin
 
-class MetricsMixin:
+
+class MetricsMixin(StoreConnectionMixin):
     def increment_metric(self, name: str, amount: float = 1.0) -> None:
         now = datetime.now(UTC).isoformat()
         with self.connect() as conn: