perf(onboarding): compute invite suggestions on-demand (#21696)

## Summary

Follow-up to #21640. In production, invite suggestions took ~1 minute to
appear because `FetchOnboardingInviteSuggestionsJob` ran on the shared
`calendarQueue` behind heavy calendar-sync jobs.

- **Drop the background job entirely.** `getInviteSuggestions` now
resolves the connected account from the authenticated
`@AuthUserWorkspaceId()` and computes suggestions on demand:
cache-first, with a bounded calendar fetch + cache write on a miss.
Removes the Google/Microsoft enqueues, the
`shouldComputeInviteSuggestions` threading through the auth controllers,
and the now-unused `shouldComputeInviteSuggestionsOnConnect` /
`isOnboardingConnectAccountPending` helpers.
- **Prefetch one step earlier.** New `usePrefetchInviteSuggestions` hook
fires the query from `CreateProfile` so the server cache is warm by the
time the invite step renders. `InviteTeam` switches from `network-only`
→ `cache-first`. If the profile step is skipped, the invite step still
computes on-demand (~1–3s, no queue) — no more minute-long waits.

No GraphQL schema change.

## Test plan

- [ ] Connect Google calendar in onboarding → invite step renders
prefilled teammates with no perceivable wait
- [ ] Connect Microsoft calendar in onboarding → same
- [ ] Onboard with workspace name already set so profile step is skipped
→ invite step still prefills (just with a brief on-demand fetch instead
of 1 min)
- [ ] Connect a non-work-email account → invite step renders empty form
(no suggestions)
- [ ] `npx nx typecheck twenty-server` ✅
- [ ] `npx nx lint:diff-with-main twenty-server` ✅
- [ ] `npx nx lint:diff-with-main twenty-front` ✅ (changed files clean)
- [ ] `google-apis.service.spec.ts` + `microsoft-apis.service.spec.ts`
pass

https://claude.ai/code/session_019MyY3bfAEij4AwSXMCLtWY

---
_Generated by [Claude
Code](https://claude.ai/code/session_019MyY3bfAEij4AwSXMCLtWY)_

<!-- This is an auto-generated description by cubic. -->
<a
href="https://cubic.dev/pr/twentyhq/twenty/pull/21696?utm_source=github"
target="_blank" rel="noopener noreferrer"
data-no-image-dialog="true"><picture><source
media="(prefers-color-scheme: dark)"
srcset="https://www.cubic.dev/buttons/review-in-cubic-dark.svg"><source
media="(prefers-color-scheme: light)"
srcset="https://www.cubic.dev/buttons/review-in-cubic-light.svg"><img
alt="Review in cubic"
src="https://www.cubic.dev/buttons/review-in-cubic-dark.svg"></picture></a>
<!-- End of auto-generated description by cubic. -->

Co-authored-by: Claude <noreply@anthropic.com>

packages/twenty-server/src/engine/core-modules/onboarding/onboarding.resolver.ts

@@ -11,6 +11,7 @@ import { type AuthContextUser } from 'src/engine/core-modules/auth/types/auth-co
 import { OnboardingInviteSuggestionsService } from 'src/modules/onboarding-invite-suggestions/services/onboarding-invite-suggestions.service';
 import { WorkspaceEntity } from 'src/engine/core-modules/workspace/workspace.entity';
 import { AuthUser } from 'src/engine/decorators/auth/auth-user.decorator';
+import { AuthUserWorkspaceId } from 'src/engine/decorators/auth/auth-user-workspace-id.decorator';
 import { AuthWorkspace } from 'src/engine/decorators/auth/auth-workspace.decorator';
 import { NoPermissionGuard } from 'src/engine/guards/no-permission.guard';
 import { UserAuthGuard } from 'src/engine/guards/user-auth.guard';
@@ -31,10 +32,12 @@ export class OnboardingResolver {
   async getInviteSuggestions(
     @AuthUser() user: AuthContextUser,
     @AuthWorkspace() workspace: WorkspaceEntity,
+    @AuthUserWorkspaceId() userWorkspaceId: string,
   ): Promise<InviteSuggestionDTO[]> {
-    return this.onboardingInviteSuggestionsService.getCachedSuggestions({
+    return this.onboardingInviteSuggestionsService.getOrComputeSuggestions({
       workspaceId: workspace.id,
       userId: user.id,
+      userWorkspaceId,
     });
   }
 

packages/twenty-server/src/engine/core-modules/onboarding/onboarding.service.ts

@@ -129,43 +129,6 @@ export class OnboardingService {
     return OnboardingStatus.COMPLETED;
   }
 
-  async isOnboardingConnectAccountPending({
-    userId,
-    workspaceId,
-  }: {
-    userId: string;
-    workspaceId: string;
-  }): Promise<boolean> {
-    const value = await this.userVarsService.get({
-      userId,
-      workspaceId,
-      key: OnboardingStepKeys.ONBOARDING_CONNECT_ACCOUNT_PENDING,
-    });
-
-    return value === true;
-  }
-
-  async shouldComputeInviteSuggestionsOnConnect({
-    userId,
-    workspaceId,
-  }: {
-    userId?: string;
-    workspaceId: string;
-  }): Promise<boolean> {
-    if (!isDefined(userId)) {
-      return false;
-    }
-
-    try {
-      return await this.isOnboardingConnectAccountPending({
-        userId,
-        workspaceId,
-      });
-    } catch {
-      return false;
-    }
-  }
-
   async setOnboardingConnectAccountPending(
     {
       userId,