Various SDK improvements (#18115)

## Summary

- **Refactor frontend metadata loading architecture**: Split the
monolithic `EagerMetadataLoadEffect` into focused provider effects
(`UserMetadataProviderEffect`, `ObjectMetadataProviderEffect`,
`ViewMetadataProviderEffect`) orchestrated by `MetadataProviderEffects`.
Replaced `UserProvider` + `ObjectMetadataItemsProvider` with a single
`MetadataGater` that gates rendering on `isAppMetadataReadyState`. The
metadata store now validates view-object consistency before promoting
views, and `updateDraft` skips no-op updates via deep equality checks.

- **SDK CLI improvements**: Added `app:typecheck` command, improved
error handling in API sync (extracts GraphQL error messages), added
`serializeError` utility for human-readable error output, added `error`
file status to dev mode orchestrator with UI support, and fixed
ClickHouse migration/seed commands to use `transpile-only`.

packages/twenty-front/src/modules/metadata-store/components/MetadataGater.tsx

@@ -0,0 +1,46 @@
+import React from 'react';
+
+import { isAppMetadataReadyState } from '@/metadata-store/states/isAppMetadataReadyState';
+import { useIsLogged } from '@/auth/hooks/useIsLogged';
+import { useDateTimeFormat } from '@/localization/hooks/useDateTimeFormat';
+import { objectMetadataItemsState } from '@/object-metadata/states/objectMetadataItemsState';
+import { useRecoilValueV2 } from '@/ui/utilities/state/jotai/hooks/useRecoilValueV2';
+import { UserContext } from '@/users/contexts/UserContext';
+import { useLocation } from 'react-router-dom';
+import { AppPath } from 'twenty-shared/types';
+import { UserOrMetadataLoader } from '~/loading/components/UserOrMetadataLoader';
+import { isMatchingLocation } from '~/utils/isMatchingLocation';
+
+export const MetadataGater = ({ children }: React.PropsWithChildren) => {
+  const isAppMetadataReady = useRecoilValueV2(isAppMetadataReadyState);
+  const objectMetadataItems = useRecoilValueV2(objectMetadataItemsState);
+  const isLoggedIn = useIsLogged();
+  const location = useLocation();
+
+  const { dateFormat, timeFormat, timeZone } = useDateTimeFormat();
+
+  const isOnExcludedPath =
+    isMatchingLocation(location, AppPath.Verify) ||
+    isMatchingLocation(location, AppPath.VerifyEmail) ||
+    isMatchingLocation(location, AppPath.CreateWorkspace);
+
+  const shouldShowLoader =
+    (!isAppMetadataReady && isLoggedIn && !isOnExcludedPath) ||
+    objectMetadataItems.length === 0;
+
+  if (shouldShowLoader) {
+    return <UserOrMetadataLoader />;
+  }
+
+  return (
+    <UserContext.Provider
+      value={{
+        dateFormat,
+        timeFormat,
+        timeZone,
+      }}
+    >
+      {children}
+    </UserContext.Provider>
+  );
+};