fix(build): disable Turbopack for Vercel deployment

- Add --webpack flag to build command to use Webpack instead of Turbopack
- Add maxDuration export to health route
- This should ensure API routes are properly detected and deployed as serverless functions

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

apps/web/src/app/api/health/route.ts

@@ -2,6 +2,7 @@ import { NextResponse } from 'next/server';
 
 export const runtime = 'nodejs';
 export const dynamic = 'force-dynamic';
+export const maxDuration = 60;
 
 /**
  * GET /api/health

apps/web/vercel.json

@@ -1,6 +1,6 @@
 {
   "$schema": "https://openapi.vercel.sh/vercel.json",
-  "buildCommand": "cd ../.. && turbo build --filter=@tpmjs/web",
+  "buildCommand": "cd ../.. && turbo build --filter=@tpmjs/web -- --webpack",
   "installCommand": "pnpm install",
   "functions": {
     "app/api/**/*.ts": {