add tasks repo update uow and manager

src/core/db_manager.py

@@ -1,3 +1,4 @@
+from src.repository.tasks import TasksRepo
 from src.repository.users import UsersRepo
 
 
@@ -8,6 +9,7 @@ class DBManager:
     async def __aenter__(self):
         self.session = self.session_factory()
         self.user = UsersRepo(self.session)
+        self.task = TasksRepo(self.session)
         return self
 
     async def __aexit__(self, exc_type, exc_val, exc_tb):