cad_model_history新增字段topology_path

docs/cad-model-annotation-api.md

@@ -212,6 +212,7 @@
       "operationType": "Extrude",
       "stepPath": "uploads/history/101.step",
       "glbPath": "uploads/history/101.glb",
+      "topologyPath": "uploads/history/101.topology.json",
       "convertStatus": "success",
       "createdAt": "2026-07-08 16:20:00",
       "updatedAt": "2026-07-08 16:20:00"
@@ -701,6 +702,7 @@
 | `operationType` | string | 操作类型 |
 | `stepPath` | string | STEP 文件路径 |
 | `glbPath` | string | GLB 文件路径 |
+| `topologyPath` | string | 拓扑文件路径 |
 | `convertStatus` | string | 转换状态 |
 | `errorMessage` | string | 转换错误信息 |
 | `createdAt` | string | 创建时间 |