Add limit statement

[MassonNN]

Rationale

We don't really need to get all rows from database if we want to get exactly one row with sqlalchemy methods. This has bad effect for database performance and need to be fixed.

Where occurs

masson-aiogram-template/src/db/repositories/abstract.py

Line 43 in 345e1b0

return (await self.session.execute(statement)).one_or_none()

How to fix

Add limit statement