feat: add archive client foundation

tests/test_generated_contract.py

@@ -0,0 +1,17 @@
+import unittest
+from pathlib import Path
+
+from archive_clients import PROTO_COMMIT
+
+
+class GeneratedContractTests(unittest.TestCase):
+    def test_all_generated_files_record_proto_commit(self):
+        files = list(Path("src/archive_control/v1").glob("*_pb2.py"))
+        files += list(Path("src/archive_control/v1").glob("*_pb2.pyi"))
+        self.assertEqual(len(files), 18)
+        for path in files:
+            self.assertIn(PROTO_COMMIT, path.read_text(encoding="utf-8")[:256])
+
+
+if __name__ == "__main__":
+    unittest.main()