feat: manually mirror opencoze's code from bytedance

Change-Id: I09a73aadda978ad9511264a756b2ce51f5761adf

backend/domain/knowledge/entity/event.go

@@ -0,0 +1,50 @@
+/*
+ * Copyright 2025 coze-dev Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package entity
+
+type Event struct {
+	Type EventType
+
+	Documents      []*Document
+	Document       *Document
+	Slice          *Slice
+	SliceIDs       []int64
+	KnowledgeID    int64
+	DocumentReview *Review
+}
+
+type EventType string
+
+// 文档 event
+// 切分 + 写入向量库操作事务性由实现自行保证
+const (
+	EventTypeIndexDocuments EventType = "index_documents"
+
+	// EventTypeIndexDocument 文档信息已写入 orm，逻辑中需要解析+切分+搜索数据入库
+	// Event requires: Event.Document
+	EventTypeIndexDocument EventType = "index_document"
+
+	// EventTypeIndexSlice 切片信息已写入 orm，逻辑中仅写入搜索数据
+	// Event requires: Event.Slice
+	EventTypeIndexSlice EventType = "index_slice"
+
+	// EventTypeDeleteKnowledgeData 删除 knowledge
+	// Event requires: Event.KnowledgeID, Event.SliceIDs
+	EventTypeDeleteKnowledgeData EventType = "delete_knowledge_data"
+
+	EventTypeDocumentReview EventType = "document_review"
+)