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/config/__init__.py

@@ -0,0 +1,9 @@
+from .dotenv_loader import load_dotenv as load_dotenv
+from .minio_config import MinioConfig as MinioConfig
+from .redis_config import RedisConfig as RedisConfig
+
+__all__ = [
+    "MinioConfig",
+    "RedisConfig",
+    "load_dotenv",
+]