fix!: removed .commit() from repository level

repositories/invoices.py

@@ -1,13 +1,14 @@
 from sqlalchemy import select
-from sqlalchemy.ext.asyncio import AsyncSession
 
 from db.models.invoice import Invoice
+from db.session import UnitOfWork
 from schemas.invoices import InvoiceStatus
 
 
 class InvoiceRepository:
-    def __init__(self, session: AsyncSession) -> None:
-        self.session = session
+    def __init__(self, uow: UnitOfWork) -> None:
+        self.uow = uow
+        self.session = uow.session
 
     async def get_by_id(self, id: int) -> Invoice | None:
         stmt = select(Invoice).where(Invoice.id == id)
@@ -32,13 +33,9 @@ class InvoiceRepository:
         )
 
         self.session.add(obj)
-        await self.session.commit()
-
         return obj
 
     async def update_status_by_id(self, invoice_id: int, status: InvoiceStatus) -> Invoice | None:
         invoice = await self.get_by_id(invoice_id)
         invoice.status = status
-        await self.session.commit()
-
         return invoice