feat: 集成 AI-Core gRPC 文档解析服务

- 新增 AICoreClient 客户端
- 添加 document_parser_client.go
- 知识库服务集成 AI-Core 解析
- 配置中添加 ai_core_service_addr

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/internal/service/knowledge_service.go

@@ -24,18 +24,21 @@ func init() {
 }
 
 type KnowledgeService struct {
-	repo            *repository.KnowledgeRepository
-	modelRepo       *repository.ModelRepository
-	uploadService   *UploadService
+	repo             *repository.KnowledgeRepository
+	modelRepo        *repository.ModelRepository
+	uploadService    *UploadService
 	pythonServiceURL string
+	aiCoreClient     *AICoreClient
 }
 
-func NewKnowledgeService(repo *repository.KnowledgeRepository, modelRepo *repository.ModelRepository, uploadService *UploadService, pythonServiceURL string) *KnowledgeService {
+func NewKnowledgeService(repo *repository.KnowledgeRepository, modelRepo *repository.ModelRepository, uploadService *UploadService, pythonServiceURL, aiCoreServiceAddr string) *KnowledgeService {
+	aiCoreClient, _ := NewAICoreClient(aiCoreServiceAddr)
 	return &KnowledgeService{
-		repo:            repo,
-		modelRepo:       modelRepo,
-		uploadService:   uploadService,
+		repo:             repo,
+		modelRepo:        modelRepo,
+		uploadService:    uploadService,
 		pythonServiceURL: pythonServiceURL,
+		aiCoreClient:     aiCoreClient,
 	}
 }
 
@@ -227,6 +230,9 @@ func (s *KnowledgeService) UploadDocument(kbID string, file *multipart.FileHeade
 	// 异步调用 Python 服务解析文档
 	go s.parseDocument(kbID, doc.ID, result.URL, kb.ParsingConfig)
 
+	// 异步调用 AI-Core gRPC 服务解析文档（获取 Markdown）
+	go s.parseDocumentWithAICore(doc.ID, result.URL, doc.Name)
+
 	return doc, result.URL, nil
 }
 
@@ -284,6 +290,32 @@ func (s *KnowledgeService) parseDocument(kbID, docID, fileURL string, config mod
 	}
 }
 
+// parseDocumentWithAICore 调用 AI-Core gRPC 服务解析文档
+func (s *KnowledgeService) parseDocumentWithAICore(docID, fileURL, fileName string) {
+	if s.aiCoreClient == nil {
+		knowledgeDebugLog.Printf("[AICore] AI-Core 客户端未初始化")
+		return
+	}
+
+	knowledgeDebugLog.Printf("[AICore] 开始解析文档: docID=%s, fileURL=%s, fileName=%s", docID, fileURL, fileName)
+
+	result, err := s.aiCoreClient.ParseDocument(fileURL, fileName, "")
+	if err != nil {
+		knowledgeDebugLog.Printf("[AICore] 解析失败: docID=%s, err=%v", docID, err)
+		return
+	}
+
+	if result.Success && result.Content != "" {
+		knowledgeDebugLog.Printf("[AICore] 解析成功: docID=%s, contentLength=%d", docID, len(result.Content))
+		// 更新文档的 Content 字段
+		s.repo.UpdateDocument(docID, map[string]interface{}{
+			"content": result.Content,
+		})
+	} else {
+		knowledgeDebugLog.Printf("[AICore] 解析返回失败: docID=%s, message=%s", docID, result.Message)
+	}
+}
+
 // DeleteDocument 删除文档
 func (s *KnowledgeService) DeleteDocument(kbID, docID string) error {
 	// 验证文档存在