fix(update): accept cmhub release metadata contract

tests/test_update_installer.py

@@ -6,6 +6,7 @@ import unittest
 import urllib.request
 import zipfile
 from pathlib import Path
+from types import SimpleNamespace
 
 from app import release_manifest, update_installer
 
@@ -71,6 +72,20 @@ class UpdateInstallerTests(unittest.TestCase):
         values.update(changes)
         return update_installer.UpdatePackageMetadata(**values)
 
+    def test_online_release_uses_internal_package_contract_defaults(self):
+        info = SimpleNamespace(
+            latest_version="0.1.6",
+            download_url="http://downloads.external.test/cmshopee.zip",
+            sha256="a" * 64,
+            size_bytes=53318076,
+        )
+
+        metadata = update_installer.metadata_from_update_info(info)
+
+        self.assertEqual(release_manifest.PACKAGE_FORMAT, metadata.package_format)
+        self.assertEqual(release_manifest.UPDATER_PROTOCOL, metadata.updater_protocol)
+        self.assertEqual(release_manifest.UPDATER_PROTOCOL, metadata.min_updater_protocol)
+
     def test_prepare_update_verifies_and_reuses_pending(self):
         with tempfile.TemporaryDirectory() as temp_dir:
             payload = self.make_zip(temp_dir)