fix(API-AI-080): enqueue import job + pass sourceId in KnowledgeSource pipeline

KnowledgeSourceService.addSource() was creating Source + DocumentImport
records but never enqueuing the job for processing. Also the worker
wasn't linking created KnowledgeItems back to their source.

Changes:
- Inject QueueService + RedisService into KnowledgeSourceService
- Enqueue document-import job after creating Source + DocumentImport
- Set Redis status keys (matching DocumentImportService pattern)
- Worker: resolve sourceId from job data or DocumentImport record
- Worker: pass sourceRef when creating KnowledgeItems

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/modules/knowledge-source/knowledge-source.service.ts

@@ -1,12 +1,16 @@
 import { Injectable, NotFoundException, BadRequestException } from '@nestjs/common';
 import { KnowledgeSourceRepository } from './knowledge-source.repository';
 import { DocumentImportRepository } from '../document-import/document-import.repository';
+import { QueueService } from '../../infrastructure/queue/queue.service';
+import { RedisService } from '../../infrastructure/redis/redis.service';
 
 @Injectable()
 export class KnowledgeSourceService {
   constructor(
     private readonly repository: KnowledgeSourceRepository,
     private readonly importRepo: DocumentImportRepository,
+    private readonly queue: QueueService,
+    private readonly redis: RedisService,
   ) {}
 
   async addSource(userId: string, knowledgeBaseId: string, dto: {
@@ -20,8 +24,8 @@ export class KnowledgeSourceService {
   }) {
     const source = await this.repository.create(userId, knowledgeBaseId, dto);
 
-    // 自动创建 import 任务
-    await this.importRepo.create({
+    // 自动创建 import 任务并入队
+    const importJob = await this.importRepo.create({
       userId,
       knowledgeBaseId,
       sourceId: source.id,
@@ -31,6 +35,20 @@ export class KnowledgeSourceService {
       status: 'QUEUED',
     });
 
+    // 设置 Redis 状态
+    await this.redis.set(`job:document-import:${importJob.id}:status`, 'pending', 86400);
+    await this.redis.set(`job:document-import:${importJob.id}:progress`, '0', 86400);
+    await this.redis.set(`job:document-import:${importJob.id}:message`, '任务已加入队列', 86400);
+
+    // 入队处理
+    await this.queue.add('document-import', {
+      importId: importJob.id,
+      userId,
+      knowledgeBaseId,
+      sourceId: source.id,
+      fileName: dto.originalFilename ?? dto.title,
+    });
+
     return source;
   }
 

src/workers/document-import.worker.ts

@@ -24,11 +24,18 @@ export class DocumentImportWorker extends WorkerHost {
     importId: string;
     userId: string;
     knowledgeBaseId?: string;
+    sourceId?: string;
     rawText?: string;
     fileName?: string;
   }>) {
     const { importId, userId, knowledgeBaseId, rawText, fileName } = job.data;
-    this.logger.log(`Processing document import job ${job.id}, importId=${importId}`);
+    // Resolve sourceId: from job data first, then fallback to DocumentImport record
+    let sourceId = job.data.sourceId;
+    if (!sourceId) {
+      const importRecord = await this.repository.findById(importId);
+      sourceId = importRecord?.sourceId ?? undefined;
+    }
+    this.logger.log(`Processing document import job ${job.id}, importId=${importId}, sourceId=${sourceId ?? 'none'}`);
 
     try {
       if (!rawText) {
@@ -62,6 +69,7 @@ export class DocumentImportWorker extends WorkerHost {
             content: kp.content,
             itemType: 'lesson',
             orderIndex: kp.suggestedOrder ?? i + 1,
+            sourceRef: sourceId,
           });
         }
       }