Add waitlist schema for marketing (FRE-635)

- Created waitlist_signups and waitlist_events tables
- Supports email, name, source tracking, and status management
- Enables VIP supporter list for Product Hunt launch
- Migration 0002_chemical_shocker.sql generated
- Fixed brand color in product-hunt-assets-brief.md (#518ac8)

server/trpc/revisions-router.test.ts

@@ -10,8 +10,8 @@ describe('revisionsRouter', () => {
 
   beforeEach(async () => {
     await resetTestDb();
-    resetInMemoryState();
     const db = await getTestDb();
+    await resetInMemoryState(db);
     ctx = { userId: 1, db };
     caller = appRouter.createCaller(ctx);
   });