feat: add /v2/billing/webhook route to RawBodyMiddleware configuration (#22032)

- Add /v2/billing/webhook alongside existing /api/v2/billing/webhook route
- Both routes now use RawBodyMiddleware for proper Stripe webhook signature verification
- Leverages NestJS forRoutes() method to accept multiple route configurations

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: morgan@cal.com <morgan@cal.com>

apps/api/v2/src/app.module.ts

@@ -86,10 +86,16 @@ export class AppModule implements NestModule {
   configure(consumer: MiddlewareConsumer): void {
     consumer
       .apply(RawBodyMiddleware)
-      .forRoutes({
-        path: "/api/v2/billing/webhook",
-        method: RequestMethod.POST,
-      })
+      .forRoutes(
+        {
+          path: "/api/v2/billing/webhook",
+          method: RequestMethod.POST,
+        },
+        {
+          path: "/v2/billing/webhook",
+          method: RequestMethod.POST,
+        }
+      )
       .apply(JsonBodyMiddleware)
       .forRoutes("*")
       .apply(RequestIdMiddleware)