fix: align startup copy with 2026 founding and deploy hybrid rendering

- Replace fabricated 12-year/500+/8+ team experience claims with
  2026 founding, first-client co-creation, professional team wording
- Remove fake case studies and unverified certifications from seeds,
  cases page, products and ERP upgrade page
- Enable Next.js standalone output and production hybrid deployment
  (Dockerfile.prod, docker-compose.server.yml, Nginx nextjs upstream)
- Add linux-musl Prisma engine target and production crypto key build
- Sync production CMS database with cleaned seed content

next.config.mjs

@@ -1,6 +1,7 @@
 const cdnDomain = process.env.CDN_DOMAIN || '';
 
 const nextConfig = {
+  output: 'standalone',
   distDir: 'dist',
   assetPrefix: cdnDomain || undefined,
   images: {