M8-T01: add meter source identity schema

app/models/__init__.py

@@ -5,12 +5,16 @@ from app.models.config import AppConfigEntry
 from app.models.location import Location
 from app.models.poo import PooRecord
 from app.models.public_ip import PublicIPHistory, PublicIPState
+from app.models.meter_source import MeterSource, MeterSourceBinding, MeterSourceChannel
 
 __all__ = [
     "AppConfigEntry",
     "AuthSession",
     "AuthUser",
     "Location",
+    "MeterSource",
+    "MeterSourceBinding",
+    "MeterSourceChannel",
     "PooRecord",
     "PublicIPHistory",
     "PublicIPState",