Fix mypy context manager typing for adapter subclasses.

Return Self from __enter__ so with-blocks preserve subclass types, and align mypy python_version with the 3.12 runtime target.

Co-authored-by: Cursor <[email protected]>

python_repositories/interfaces/context_aware_interface.py

@@ -3,13 +3,14 @@
 from __future__ import annotations
 
 from abc import ABC, abstractmethod
+from typing import Self
 
 
 class ContextAwareInterface(ABC):
     """Interface that defines context-related methods."""
 
     @abstractmethod
-    def __enter__(self) -> ContextAwareInterface:
+    def __enter__(self) -> Self:
         """Enter the context."""
         ...