Add public repository interfaces and subclassable adapter CRUD API.

Define split JSON and object repository ABCs, promote adapter methods to public CRUD, add example domain repositories, modernize interface stubs, and make the package installable for tests.

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

tests/integration/examples_test.py

@@ -0,0 +1,57 @@
+"""Integration tests for example domain repositories."""
+
+from collections.abc import Generator
+from io import BytesIO
+import random
+
+import pytest
+from python_repositories.examples.artifact_object_repository import (
+    ArtifactObjectRepository,
+)
+from python_repositories.examples.user_json_repository import UserJsonRepository
+
+
+@pytest.fixture(scope="module")
+def user_data() -> Generator[dict[str, str]]:
+    """Provide sample user data for tests."""
+    yield {"name": "Alice", "email": "[email protected]"}
+
+
+@pytest.fixture(scope="module")
+def artifact_data() -> Generator[BytesIO]:
+    """Provide sample artifact data for tests."""
+    yield BytesIO(random.randbytes(2**20))
+
+
+def test_user_json_repository_save_and_get(
+    redis_container: str,
+    user_data: dict[str, str],
+) -> None:
+    """Test that UserJsonRepository can save and retrieve a user."""
+    with UserJsonRepository() as repo:
+        repo.save_user("alice", user_data)
+        assert repo.get_user("alice") == user_data
+
+
+def test_user_json_repository_delete(
+    redis_container: str,
+    user_data: dict[str, str],
+) -> None:
+    """Test that UserJsonRepository can delete a user."""
+    with UserJsonRepository() as repo:
+        repo.save_user("alice", user_data)
+        repo.delete_user("alice")
+        assert repo.get_user("alice") is None
+
+
+def test_artifact_object_repository_store_and_get(
+    minio_container: dict[str, str],
+    artifact_data: BytesIO,
+) -> None:
+    """Test that ArtifactObjectRepository can store and retrieve an artifact."""
+    with ArtifactObjectRepository() as repo:
+        repo.store_artifact("report-1", artifact_data)
+        received = repo.get_artifact("report-1")
+        assert received is not None
+        artifact_data.seek(0)
+        assert received.read() == artifact_data.read()