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-sdk/src/cli/utilities/error/serialize-error.ts

@@ -0,0 +1,52 @@
+import axios from 'axios';
+
+export const serializeError = (error: unknown): string => {
+  if (typeof error === 'string') {
+    return error;
+  }
+
+  if (axios.isAxiosError(error)) {
+    const parts: string[] = [];
+    const status = error.response?.status;
+    const statusText = error.response?.statusText;
+
+    if (status) {
+      parts.push(`HTTP ${status}${statusText ? ` ${statusText}` : ''}`);
+    }
+
+    const graphqlErrors = error.response?.data?.errors;
+
+    if (Array.isArray(graphqlErrors) && graphqlErrors.length > 0) {
+      const messages = graphqlErrors
+        .map(
+          (graphqlError: { message?: string }) =>
+            graphqlError.message ?? 'Unknown GraphQL error',
+        )
+        .join('; ');
+
+      parts.push(messages);
+    } else if (error.response?.data?.message) {
+      parts.push(error.response.data.message);
+    } else if (error.message) {
+      parts.push(error.message);
+    }
+
+    if (error.code) {
+      parts.push(`(${error.code})`);
+    }
+
+    return parts.join(' - ') || 'Unknown Axios error';
+  }
+
+  if (error instanceof Error) {
+    return error.message || error.toString();
+  }
+
+  const stringified = JSON.stringify(error, null, 2);
+
+  if (stringified === '{}' || stringified === undefined) {
+    return String(error);
+  }
+
+  return stringified;
+};