Add config and client injection with test reorganization.

Introduce typed config objects, optional adapter injection, and .env loading to simplify testing while preserving env-based defaults for production usage.

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

python_repositories/__init__.py

@@ -6,6 +6,7 @@ from typing import TYPE_CHECKING
 
 # Interfaces are always available; they have no optional backend dependencies.
 from . import adapters
+from .config import MinioConfig, RedisConfig, load_dotenv
 from .interfaces import (
     ConnectionAwareInterface,
     ContextAwareInterface,
@@ -22,7 +23,10 @@ __all__ = [
     "ConnectionAwareInterface",
     "ContextAwareInterface",
     "JsonRepositoryInterface",
+    "MinioConfig",
     "ObjectRepositoryInterface",
+    "RedisConfig",
+    "load_dotenv",
     *adapters.__all__,
 ]