refactor(api): replace new Logger() with DI LoggerService and split large files

- Migrate 30 files from `new Logger(ClassName.name)` to injected LoggerService
  for consistent PII masking and centralized logging config
- Split prisma-admin-query.repository.ts (313→121 lines) into admin-stats.queries.ts
  and admin-user.queries.ts
- Split admin.controller.ts (285→154 lines) into admin-moderation.controller.ts
- Split prisma-listing.repository.ts (274→111 lines) into listing-read.queries.ts
- Update 28 test files with mock LoggerService
- All 831 tests passing, zero direct new Logger() calls remaining

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/api/src/modules/inquiries/application/__tests__/create-inquiry.handler.spec.ts

@@ -27,10 +27,13 @@ describe('CreateInquiryHandler', () => {
       listing: { findUnique: vi.fn() },
     };
 
+    const mockLogger = { log: vi.fn(), warn: vi.fn(), error: vi.fn(), debug: vi.fn(), verbose: vi.fn() };
+
     handler = new CreateInquiryHandler(
       mockInquiryRepo as any,
       mockEventBus as unknown as EventBus,
       mockPrisma as any,
+      mockLogger as any,
     );
   });
 

apps/api/src/modules/inquiries/application/__tests__/mark-inquiry-read.handler.spec.ts

@@ -30,10 +30,13 @@ describe('MarkInquiryReadHandler', () => {
       agent: { findUnique: vi.fn() },
     };
 
+    const mockLogger = { log: vi.fn(), warn: vi.fn(), error: vi.fn(), debug: vi.fn(), verbose: vi.fn() };
+
     handler = new MarkInquiryReadHandler(
       mockInquiryRepo as any,
       mockEventBus as unknown as EventBus,
       mockPrisma as any,
+      mockLogger as any,
     );
   });
 

apps/api/src/modules/inquiries/application/commands/create-inquiry/create-inquiry.handler.ts

@@ -1,7 +1,7 @@
-import { Inject, Logger } from '@nestjs/common';
+import { Inject } from '@nestjs/common';
 import { CommandHandler, type EventBus, type ICommandHandler } from '@nestjs/cqrs';
 import { createId } from '@paralleldrive/cuid2';
-import { NotFoundException, type PrismaService } from '@modules/shared';
+import { NotFoundException, type PrismaService, type LoggerService } from '@modules/shared';
 import { InquiryEntity } from '../../../domain/entities/inquiry.entity';
 import { INQUIRY_REPOSITORY, type IInquiryRepository } from '../../../domain/repositories/inquiry.repository';
 import { CreateInquiryCommand } from './create-inquiry.command';
@@ -14,12 +14,11 @@ export interface CreateInquiryResult {
 
 @CommandHandler(CreateInquiryCommand)
 export class CreateInquiryHandler implements ICommandHandler<CreateInquiryCommand> {
-  private readonly logger = new Logger(CreateInquiryHandler.name);
-
   constructor(
     @Inject(INQUIRY_REPOSITORY) private readonly inquiryRepo: IInquiryRepository,
     private readonly eventBus: EventBus,
     private readonly prisma: PrismaService,
+    private readonly logger: LoggerService,
   ) {}
 
   async execute(command: CreateInquiryCommand): Promise<CreateInquiryResult> {
@@ -49,7 +48,7 @@ export class CreateInquiryHandler implements ICommandHandler<CreateInquiryComman
       this.eventBus.publish(event);
     }
 
-    this.logger.log(`Inquiry ${id} created by user ${command.userId} for listing ${command.listingId}`);
+    this.logger.log(`Inquiry ${id} created by user ${command.userId} for listing ${command.listingId}`, 'CreateInquiryHandler');
 
     return {
       id,

apps/api/src/modules/inquiries/application/commands/mark-inquiry-read/mark-inquiry-read.handler.ts

@@ -1,17 +1,16 @@
-import { Inject, Logger } from '@nestjs/common';
+import { Inject } from '@nestjs/common';
 import { CommandHandler, type EventBus, type ICommandHandler } from '@nestjs/cqrs';
-import { ForbiddenException, NotFoundException, type PrismaService } from '@modules/shared';
+import { ForbiddenException, NotFoundException, type PrismaService, type LoggerService } from '@modules/shared';
 import { INQUIRY_REPOSITORY, type IInquiryRepository } from '../../../domain/repositories/inquiry.repository';
 import { MarkInquiryReadCommand } from './mark-inquiry-read.command';
 
 @CommandHandler(MarkInquiryReadCommand)
 export class MarkInquiryReadHandler implements ICommandHandler<MarkInquiryReadCommand> {
-  private readonly logger = new Logger(MarkInquiryReadHandler.name);
-
   constructor(
     @Inject(INQUIRY_REPOSITORY) private readonly inquiryRepo: IInquiryRepository,
     private readonly eventBus: EventBus,
     private readonly prisma: PrismaService,
+    private readonly logger: LoggerService,
   ) {}
 
   async execute(command: MarkInquiryReadCommand): Promise<void> {
@@ -46,6 +45,6 @@ export class MarkInquiryReadHandler implements ICommandHandler<MarkInquiryReadCo
       this.eventBus.publish(event);
     }
 
-    this.logger.log(`Inquiry ${command.inquiryId} marked as read by agent ${command.agentUserId}`);
+    this.logger.log(`Inquiry ${command.inquiryId} marked as read by agent ${command.agentUserId}`, 'MarkInquiryReadHandler');
   }
 }