feat: Implement Prisma PG adapter, refactor user and agent profiles in schema, and add database seeding.

src/main.ts

@@ -3,7 +3,7 @@ import { ValidationPipe, Logger } from '@nestjs/common';
 import { ConfigService } from '@nestjs/config';
 import { SwaggerModule, DocumentBuilder } from '@nestjs/swagger';
 import helmet from 'helmet';
-import * as cookieParser from 'cookie-parser';
+import cookieParser from 'cookie-parser';
 import { AppModule } from './app.module';
 import { AllExceptionsFilter } from './common/filters';
 import { TransformInterceptor } from './common/interceptors';

src/prisma/prisma.service.ts

@@ -1,18 +1,29 @@
 import { Injectable, OnModuleInit, OnModuleDestroy } from '@nestjs/common';
 import { PrismaClient } from '@prisma/client';
+import { PrismaPg } from '@prisma/adapter-pg';
+import { Pool } from 'pg';
 
 @Injectable()
 export class PrismaService
   extends PrismaClient
   implements OnModuleInit, OnModuleDestroy
 {
+  private pool: Pool;
+
   constructor() {
+    const connectionString = process.env.DATABASE_URL;
+    const pool = new Pool({ connectionString });
+    const adapter = new PrismaPg(pool);
+
     super({
+      adapter,
       log:
         process.env.NODE_ENV === 'development'
           ? ['query', 'info', 'warn', 'error']
           : ['error'],
     });
+
+    this.pool = pool;
   }
 
   async onModuleInit() {
@@ -21,6 +32,7 @@ export class PrismaService
 
   async onModuleDestroy() {
     await this.$disconnect();
+    await this.pool.end();
   }
 
   async cleanDatabase() {