feat(observability): add structured request logs with request-id middleware

Fabric.Backend.Guild/src/main.ts

@@ -3,10 +3,12 @@ import { ValidationPipe } from '@nestjs/common';
 import { NestFactory } from '@nestjs/core';
 import { DocumentBuilder, SwaggerModule } from '@nestjs/swagger';
 import { AppModule } from './app.module';
+import { requestContextMiddleware } from './common/request-context.middleware';
 
 async function bootstrap() {
   const app = await NestFactory.create(AppModule);
   app.setGlobalPrefix('api');
+  app.use(requestContextMiddleware);
   app.useGlobalPipes(
     new ValidationPipe({
       whitelist: true,