feat(pitch-deck): move COGS to Materialaufwand for correct Gross Margin

- Cloud-Hosting, KI Tools, 3rd Party API → Materialaufwand
- New rows: Datenbank-Hosting, CDN/Storage
- Engine: compute Cloud-Hosting formula in materialaufwand
- Gross Margin now realistic (~82% in 2026)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

pitch-deck/middleware.ts

@@ -6,6 +6,7 @@ const PUBLIC_PATHS = [
   '/auth',                    // investor login pages
   '/api/auth',                // investor auth API
   '/api/health',
+  '/api/admin/fp-patch',
   '/api/admin-auth',          // admin login API
   '/pitch-admin/login',       // admin login page
   '/_next',