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)

src/routes.tsx

@@ -10,6 +10,7 @@ import { Features } from './routes/features/Features';
 import { Pricing } from './routes/pricing/Pricing';
 import { About } from './routes/about/About';
 import { Faq } from './routes/faq/Faq';
+import { NotFound } from './routes/NotFound';
 import '../styles/landing.css';
 import '../styles/blog.css';
 import '../styles/features.css';
@@ -36,6 +37,7 @@ export const routes = [
   <Route path="/blog/:slug" component={BlogPost} />,
   <Route path="/sign-in" component={SignIn} />,
   <Route path="/sign-up" component={SignUp} />,
+  <Route path="*404" component={NotFound} />,
   <Route path="/app" component={AppLayout}>
     <Route path="" component={Redirect} />,
     <Route path="dashboard" component={ProtectedRoute}>