initial commit

src/common/interceptors/response-transform.interceptor.ts

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+import {
+  CallHandler,
+  ExecutionContext,
+  Injectable,
+  NestInterceptor,
+} from '@nestjs/common';
+import { Observable } from 'rxjs';
+import { map } from 'rxjs/operators';
+import { BaseInquiryResponseDto } from '../dto/base-inquiry-response.dto';
+
+/**
+ * Ensures inquiry endpoints always emit BaseInquiryResponseDto shape.
+ */
+@Injectable()
+export class ResponseTransformInterceptor implements NestInterceptor {
+  intercept(_context: ExecutionContext, next: CallHandler): Observable<unknown> {
+    return next.handle().pipe(
+      map((data: BaseInquiryResponseDto) => data),
+    );
+  }
+}