feat: Initialize NestJS backend project with Prisma, core modules, configuration, and common utilities.

src/app.module.ts

@@ -0,0 +1,54 @@
+import { Module } from '@nestjs/common';
+import { ConfigModule } from '@nestjs/config';
+import { ThrottlerModule, ThrottlerGuard } from '@nestjs/throttler';
+import { APP_GUARD } from '@nestjs/core';
+import { ScheduleModule } from '@nestjs/schedule';
+import { EventEmitterModule } from '@nestjs/event-emitter';
+
+import { configuration } from './config';
+import { PrismaModule } from './prisma';
+import { AppController } from './app.controller';
+import { AppService } from './app.service';
+
+@Module({
+  imports: [
+    // Configuration
+    ConfigModule.forRoot({
+      isGlobal: true,
+      load: [configuration],
+      envFilePath: ['.env.local', '.env'],
+    }),
+
+    // Rate Limiting
+    ThrottlerModule.forRoot([
+      {
+        ttl: 60000, // 60 seconds
+        limit: 100, // 100 requests per minute
+      },
+    ]),
+
+    // Task Scheduling
+    ScheduleModule.forRoot(),
+
+    // Event Emitter
+    EventEmitterModule.forRoot(),
+
+    // Database
+    PrismaModule,
+
+    // Feature Modules (will be added as we develop them)
+    // AuthModule,
+    // UsersModule,
+    // AgentsModule,
+  ],
+  controllers: [AppController],
+  providers: [
+    AppService,
+    // Global Rate Limiting Guard
+    {
+      provide: APP_GUARD,
+      useClass: ThrottlerGuard,
+    },
+  ],
+})
+export class AppModule {}