migrate from SQLite to PostgreSQL with Drizzle ORM

- Updated all packages to latest versions (React 19, Next.js 14.2.32)
- Replaced sqlite3 with pg and drizzle-orm dependencies
- Created complete PostgreSQL schema with relationships and indexes
- Migrated all API endpoints from SQLite to Drizzle queries
- Added database seeding with sample data
- Updated authentication to use bcrypt instead of pbkdf2
- Configured connection pooling for PostgreSQL
- Updated app version to 1.0.0
- All endpoints tested and working correctly

drizzle.config.ts

@@ -0,0 +1,13 @@
+import { defineConfig } from 'drizzle-kit';
+import * as dotenv from 'dotenv';
+
+dotenv.config({ path: '.env.local' });
+
+export default defineConfig({
+  schema: './lib/db/schema.ts',
+  out: './drizzle',
+  dialect: 'postgresql',
+  dbCredentials: {
+    url: process.env.DATABASE_URL!,
+  },
+});