Add install your first apps onboarding V2 step (#22347)

https://github.com/user-attachments/assets/5326d48f-1842-4db1-bc7c-94852145c035


<img width="838" height="754" alt="CleanShot 2026-06-30 at 16 25 05@2x"
src="https://github.com/user-attachments/assets/5c7d53d7-4d65-4e35-aed1-edf0c104e140"
/>


Adds an "Install your first apps" step to the V2 onboarding, shown right
after import-contacts. It lets users opt into installing marketplace
apps (Call recorder and People Data Labs for now) during onboarding.

- New backend `OnboardingStatus.APPS_INSTALLATION` (between SYNC_EMAIL
and PROFILE_CREATION); V1 auto-skips it.
- The primary button sends the selected app ids to the server via
`triggerInstallAppsOnboardingStep`, which enqueues a dedicated job that
installs them asynchronously so onboarding isn't blocked. Skip continues
without installing.
- The workspace is credited per app on successful installation. Credits
are env-driven via `ONBOARDING_INSTALL_APPS_CREDITS_REWARD_PER_APP`,
shown as "Earn +N free credits (1 per tool)".

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packages/twenty-client-sdk/src/metadata/generated/schema.graphql

@@ -1022,6 +1022,7 @@ enum OnboardingStatus {
   WORKSPACE_ACTIVATION
   PROFILE_CREATION
   SYNC_EMAIL
+  APPS_INSTALLATION
   INVITE_TEAM
   BOOK_ONBOARDING
   COMPLETED
@@ -3314,6 +3315,7 @@ type Mutation {
   assignRoleToApiKey(apiKeyId: UUID!, roleId: UUID!): Boolean!
   skipSyncEmailOnboardingStep: OnboardingStepSuccess!
   skipBookOnboardingStep: OnboardingStepSuccess!
+  triggerInstallAppsOnboardingStep(universalIdentifiers: [String!]!): OnboardingStepSuccess!
   updateOneApplicationVariable(key: String!, value: String!, applicationId: UUID!): Boolean!
   checkoutSession(recurringInterval: SubscriptionInterval!, plan: BillingPlanKey! = PRO, requirePaymentMethod: Boolean! = true, successUrlPath: String): BillingSession!
   createSubscriptionPaymentIntent(recurringInterval: SubscriptionInterval!, plan: BillingPlanKey! = PRO, requirePaymentMethod: Boolean! = true, successUrlPath: String, idempotencyKey: String!): BillingPaymentIntent!