feat: initial NFC Attendance Hub implementation

- Multi-tenant client management with unique API keys
- Semaphore SMS integration (per-client key + sender name + credit balance)
- DB-based SMS queue with 3-attempt retry and exponential backoff
- Failed SMS dashboard with manual retry button
- Reports page with date/client filter and CSV export
- Admin auth via NextAuth (email/password)
- Docker Compose setup (app + PostgreSQL 16)
- Prisma 5 schema with SmsQueue, SmsLog, Client, User models

Tech: Next.js 14 App Router + TypeScript + Tailwind CSS + Prisma + PostgreSQL

docker-entrypoint.sh

@@ -0,0 +1,25 @@
+#!/bin/sh
+set -e
+
+echo "🚀 Running database migrations..."
+npx prisma migrate deploy || npx prisma db push --accept-data-loss
+
+echo "🌱 Seeding initial data..."
+node -e "
+const { PrismaClient } = require('@prisma/client');
+const bcrypt = require('bcryptjs');
+const prisma = new PrismaClient();
+async function seed() {
+  const email = process.env.SEED_EMAIL || 'admin@nfchub.local';
+  const pass = process.env.SEED_PASSWORD || 'admin123';
+  const existing = await prisma.user.findUnique({ where: { email } });
+  if (!existing) {
+    const hashed = await bcrypt.hash(pass, 12);
+    await prisma.user.create({ data: { email, password: hashed, name: 'Admin', role: 'ADMIN' } });
+    console.log('Admin user created:', email);
+  }
+}
+seed().catch(console.error).finally(() => prisma.\$disconnect());
+" || true
+
+exec "$@"