feat: scaffold NestJS monorepo with Prisma and global modules

[Ali7040]

Set up the base NestJS application with:

• PrismaModule (global, singleton PrismaService)
• RedisModule (global, singleton ioredis client via REDIS_CLIENT injection token)
• ConfigModule (global, .env loaded via @nestjs/config)
• ThrottlerModule backed by Redis (100 req/min for free tier)
• ValidationPipe globally with whitelist: true
• main.ts with CORS configured via WEB_URL env var

Acceptance criteria:

• pnpm dev starts the API on :3000
• GET / returns { status: 'ok', version: '0.1.0' }
• Redis and Postgres connections are validated on startup