Bootstrap Python project and add base domain model

tests/test_base_model.py

@@ -0,0 +1,21 @@
+from datetime import UTC
+from uuid import UUID
+
+from mka.models.base import DomainModel
+
+
+def test_domain_model_creates_uuid_and_utc_timestamps() -> None:
+    model = DomainModel()
+
+    assert isinstance(model.id, UUID)
+    assert model.created_at.tzinfo is UTC
+    assert model.updated_at.tzinfo is UTC
+
+
+def test_domain_model_json_roundtrip() -> None:
+    original = DomainModel()
+
+    serialized = original.model_dump_json()
+    restored = DomainModel.model_validate_json(serialized)
+
+    assert restored == original