feat:add bill delay

app/repositories/bill_delay.py

@@ -0,0 +1,8 @@
+from app.config import TaskEnv
+from app.models.bill_delay import BillDelayModel
+from core.repositories.base import BaseRepository
+
+
+class BillDelayRepository(BaseRepository):
+    def __init__(self):
+        super().__init__(collection=TaskEnv.CLN_BILL_DELAY, model=BillDelayModel)