Separate system operations from core objects in GraphQL endpoints (#12977)

Moves system-level operations (auth, billing, admin) to use the
/metadata endpoint instead of /graphql.

This cleans up the endpoint separation so /graphql is purely for core
objects (Company, People, etc.) and /metadata handles all system
operations.

Part of prep work for webhook/API key core migration.

packages/twenty-front/src/modules/analytics/hooks/useEventTracker.ts

@@ -4,7 +4,7 @@ import {
   AnalyticsType,
   MutationTrackAnalyticsArgs,
   useTrackAnalyticsMutation,
-} from '~/generated/graphql';
+} from '~/generated-metadata/graphql';
 
 export const ANALYTICS_COOKIE_NAME = 'analyticsCookie';
 export const getSessionId = (): string => {