fix(platform-service): harden register/stripe flows for multi-product correctness

- Make auth register provisioning truly best-effort (warn on failure, do not fail signup)
- Process Stripe webhook events for all products (remove non-default skip)
- Derive updated subscription plan from Stripe price IDs on subscription.updated
- Sync derived plan to auth users and backend plan sync endpoint
- Verified: tsc --noEmit clean, 20 test files / 183 tests passing

services/platform-service/src/modules/auth/routes.ts

@@ -96,36 +96,50 @@ export async function authRoutes(app: FastifyInstance) {
 
     // Registration hook: initialize subscription + license using product defaults.
     // Best-effort during migration; auth account creation remains primary.
-    await subscriptionRepo.createSubscription({
-      id: `sub_${user.id}_${Date.now()}`,
-      productId,
-      userId: user.id,
-      plan: initialPlan,
-      status: hasTrial ? 'trialing' : 'active',
-      currentPeriodStart: nowIso,
-      currentPeriodEnd: hasTrial ? trialEnd.toISOString() : nowIso,
-      cancelAtPeriodEnd: false,
-      monthlyPrice: 0,
-      tokensIncluded: 0,
-      tokensUsed: 0,
-      createdAt: nowIso,
-      updatedAt: nowIso,
-    });
+    try {
+      await subscriptionRepo.createSubscription({
+        id: `sub_${user.id}_${Date.now()}`,
+        productId,
+        userId: user.id,
+        plan: initialPlan,
+        status: hasTrial ? 'trialing' : 'active',
+        currentPeriodStart: nowIso,
+        currentPeriodEnd: hasTrial ? trialEnd.toISOString() : nowIso,
+        cancelAtPeriodEnd: false,
+        monthlyPrice: 0,
+        tokensIncluded: 0,
+        tokensUsed: 0,
+        createdAt: nowIso,
+        updatedAt: nowIso,
+      });
+    } catch (err) {
+      req.log.warn(
+        { err, userId: user.id, productId },
+        'Subscription provisioning failed during register'
+      );
+    }
 
-    await licenseRepo.create({
-      id: `lic_${crypto.randomUUID()}`,
-      productId,
-      key: licenseRepo.generateKey(product.licensePrefix),
-      userId: user.id,
-      plan: initialPlan,
-      status: 'active',
-      activatedAt: null,
-      expiresAt: hasTrial ? trialEnd.toISOString() : null,
-      deviceIds: [],
-      maxDevices: product.deviceLimits[initialPlan],
-      createdAt: nowIso,
-      updatedAt: nowIso,
-    });
+    try {
+      await licenseRepo.create({
+        id: `lic_${crypto.randomUUID()}`,
+        productId,
+        key: licenseRepo.generateKey(product.licensePrefix),
+        userId: user.id,
+        plan: initialPlan,
+        status: 'active',
+        activatedAt: null,
+        expiresAt: hasTrial ? trialEnd.toISOString() : null,
+        deviceIds: [],
+        maxDevices: product.deviceLimits[initialPlan],
+        createdAt: nowIso,
+        updatedAt: nowIso,
+      });
+    } catch (err) {
+      req.log.warn(
+        { err, userId: user.id, productId },
+        'License provisioning failed during register'
+      );
+    }
 
     const accessToken = await jwt.createAccessToken({
       sub: user.id,

services/platform-service/src/modules/stripe/routes.ts

@@ -110,10 +110,6 @@ export async function stripeRoutes(app: FastifyInstance) {
     // Route by productId in metadata (multi-tenant)
     const metadata = getEventMetadata(event);
     const eventProductId = metadata?.productId || DEFAULT_PRODUCT_ID;
-    if (eventProductId !== DEFAULT_PRODUCT_ID) {
-      app.log.info(`Ignoring event for product ${eventProductId}`);
-      return { received: true, skipped: true };
-    }
 
     switch (event.type) {
       case 'checkout.session.completed': {
@@ -183,19 +179,21 @@ export async function stripeRoutes(app: FastifyInstance) {
         const customerId = typeof sub.customer === 'string' ? sub.customer : sub.customer.id;
         const existing = await subRepo.getByStripeCustomerId(customerId, eventProductId);
         if (existing) {
+          const updatedPlan = getPlanFromSubscription(sub) ?? existing.plan;
           const newStatus = sub.cancel_at_period_end
             ? 'cancelled'
             : sub.status === 'active'
               ? 'active'
               : 'past_due';
           await subRepo.updateSubscription(existing.id, existing.userId, {
+            plan: updatedPlan,
             status: newStatus,
             cancelAtPeriodEnd: sub.cancel_at_period_end,
             currentPeriodEnd: new Date(sub.current_period_end * 1000).toISOString(),
           });
-          await authRepo.updatePlan(existing.userId, eventProductId, existing.plan);
+          await authRepo.updatePlan(existing.userId, eventProductId, updatedPlan);
           // Sync plan to backend users container
-          await syncUserPlan(existing.userId, existing.plan, app.log);
+          await syncUserPlan(existing.userId, updatedPlan, app.log);
         }
         break;
       }
@@ -279,3 +277,12 @@ function getEventMetadata(event: Stripe.Event): Record<string, string> | null {
   }
   return null;
 }
+
+function getPlanFromSubscription(sub: Stripe.Subscription): SubscriptionDoc['plan'] | null {
+  const priceId = sub.items.data[0]?.price?.id;
+  if (!priceId) return null;
+  const priceIds = getPriceIds();
+  if (priceId === priceIds.enterprise) return 'enterprise';
+  if (priceId === priceIds.pro) return 'pro';
+  return null;
+}