feat: implement GEWU service and local agent workflows

tests/domain/test_agent_pack_manifest.py

@@ -0,0 +1,14 @@
+import subprocess
+import sys
+
+from scripts.export_agent_contract import PACK
+
+
+def test_pack_manifest_and_nested_contract_hashes_verify() -> None:
+    result = subprocess.run(
+        [sys.executable, str(PACK / "scripts" / "manifest_tool.py"), "verify"],
+        capture_output=True,
+        check=False,
+        text=True,
+    )
+    assert result.returncode == 0, result.stderr