Delegate top-level adapter imports to adapters package.

Keep lazy loading in adapters/__init__.py as the single place to register new adapters.

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

tests/unit/optional_dependencies_test.py

@@ -93,3 +93,10 @@ def test_top_level_lazy_import_propagates_minio_import_error() -> None:
     ):
         with pytest.raises(ImportError, match=r"python-repositories\[minio\]"):
             _ = python_repositories.MinioAdapter
+
+
+def test_adapters_subpackage_lazy_import_succeeds() -> None:
+    """Adapter subpackage imports delegate to the same lazy loader."""
+    from python_repositories.adapters import RedisAdapter
+
+    assert RedisAdapter.__name__ == "RedisAdapter"