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/api/api-service.ts

@@ -356,9 +356,27 @@ export class ApiService {
         message: `Successfully synced application: ${manifest.application.displayName}`,
       };
     } catch (error) {
+      if (axios.isAxiosError(error) && error.response) {
+        const graphqlErrors = error.response.data?.errors;
+
+        if (Array.isArray(graphqlErrors) && graphqlErrors.length > 0) {
+          return {
+            success: false,
+            error: graphqlErrors[0]?.message || error.message,
+          };
+        }
+
+        return {
+          success: false,
+          error:
+            error.response.data?.message ||
+            `HTTP ${error.response.status}: ${error.message}`,
+        };
+      }
+
       return {
         success: false,
-        error,
+        error: error instanceof Error ? error.message : error,
       };
     }
   }