chore: commit remaining integration files, PM2 single instance, PRD doc

apps/server/src/sync/sync.module.ts

@@ -1,6 +1,7 @@
 import { Module } from '@nestjs/common';
 import { ScheduleModule } from '@nestjs/schedule';
 import { TypeOrmModule } from '@nestjs/typeorm';
+import { IntegrationModule } from '../integration/integration.module';
 import { SyncLog, SyncState } from '../entities';
 import { SyncService } from './sync.service';
 import { SyncController } from './sync.controller';
@@ -9,6 +10,7 @@ import { SyncController } from './sync.controller';
   imports: [
     ScheduleModule.forRoot(),
     TypeOrmModule.forFeature([SyncLog, SyncState]),
+    IntegrationModule,
   ],
   controllers: [SyncController],
   providers: [SyncService],