feat: add source: 'onboarding' metadata to subscriptions from onboarding v3 (#26619)

When a user signs up to a team/org from onboarding v3, the subscription
now includes source: 'onboarding' in its metadata. This helps track
which subscriptions originated from the onboarding flow.

Changes:
- Add source: 'onboarding' to subscription_data.metadata in team checkout
  when isOnboarding is true
- Add source: 'onboarding' to subscription metadata for organization
  onboarding flow

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: Anik Dhabal Babu <81948346+anikdhabal@users.noreply.github.com>

packages/features/ee/organizations/lib/OrganizationPaymentService.ts

@@ -274,11 +274,12 @@ export class OrganizationPaymentService {
       })
     );
 
-    const subscriptionData = ORG_TRIAL_DAYS
-      ? {
-          trial_period_days: ORG_TRIAL_DAYS,
-        }
-      : undefined;
+    const subscriptionData = {
+      ...(ORG_TRIAL_DAYS && { trial_period_days: ORG_TRIAL_DAYS }),
+      metadata: {
+        source: "onboarding",
+      },
+    };
 
     return this.billingService.createSubscriptionCheckout({
       customerId: stripeCustomerId,
@@ -292,7 +293,7 @@ export class OrganizationPaymentService {
         pricePerSeat: config.pricePerSeat,
         billingPeriod: config.billingPeriod,
       },
-      ...(subscriptionData && { subscriptionData }),
+      subscriptionData,
     });
   }
 

packages/features/ee/teams/lib/payments.ts

@@ -97,6 +97,9 @@ export const generateTeamCheckoutSession = async ({
     },
     subscription_data: {
       trial_period_days: 14, // Add a 14-day trial
+      metadata: {
+        ...(isOnboarding && { source: "onboarding" }),
+      },
     },
     metadata: {
       type: CHECKOUT_SESSION_TYPES.TEAM_CREATION,