style(cloud): reformat modules and restore except-tuple parentheses

Apply consistent line-length formatting across governance, plugins, the
SDK routers (governance_api, user_api), user_auth, and migrations
0003/0005/0006.

Also restore the parentheses on two except clauses that had been dropped
into invalid Python 3 `except A, B:` syntax: plugins._coerce_to_manifest
(KeyError, ValueError) and PasswordHasher.verify (InvalidHashError,
VerificationError). Both modules now import cleanly again.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/cloud-platform/cloud/plugins.py

@@ -142,9 +142,7 @@ class PluginRegistry:
                 self.register(manifest)
                 result.registered.append(manifest)
             except _PLUGIN_REGISTRATION_FAILURES as exc:
-                result.errors.append(
-                    f"entry-point plugin {manifest.name!r}: {exc}"
-                )
+                result.errors.append(f"entry-point plugin {manifest.name!r}: {exc}")
         if scan_path is not None:
             for manifest in self.discover_manifest_files(scan_path):
                 try:
@@ -167,8 +165,12 @@ class PluginRegistry:
         for entry_point in entry_points:
             try:
                 loaded = entry_point.load()
-            except Exception as exc:  # pragma: no cover - exercised via fake eps in tests
-                logger.warning("entry point %r failed to load: %s", entry_point.name, exc)
+            except (
+                Exception
+            ) as exc:  # pragma: no cover - exercised via fake eps in tests
+                logger.warning(
+                    "entry point %r failed to load: %s", entry_point.name, exc
+                )
                 continue
             manifest = _coerce_to_manifest(loaded)
             if manifest is not None: