feat: initialize aivideo project

backend/app/modules/pricing/repository.py

@@ -0,0 +1,16 @@
+from sqlalchemy import select
+from sqlalchemy.orm import Session
+
+from app.models.entities import PricingRule
+
+
+class PricingRepository:
+    def __init__(self, db: Session) -> None:
+        self.db = db
+
+    def list_rules(self):
+        return self.db.query(PricingRule).order_by(PricingRule.id.desc())
+
+    def get_rule(self, rule_id: int) -> PricingRule | None:
+        return self.db.scalar(select(PricingRule).where(PricingRule.id == rule_id))
+