feat: query all process nodes for business_object

stateflow/API.md

@@ -268,6 +268,37 @@ Authorization: Bearer <access_token>
 - **描述**: 获取当前待执行节点（`current_state`）的参数模板。
 - **注意**: `current_state` 指的是下一个待执行的节点。如果流程已完成，则返回空。
 
+#### 3.7.5. 获取流程的所有节点
+
+- **GET** `/api/v1/stateflow/business-objects/{id}/process-nodes/`
+- **描述**: 获取业务对象所属流程的所有状态节点列表，按顺序排列。
+- **响应示例**:
+  ```json
+  {
+    "count": 3,
+    "nodes": [
+      {
+        "id": 1,
+        "state_id": 10,
+        "state_name": "质检",
+        "order": 0
+      },
+      {
+        "id": 2,
+        "state_id": 11,
+        "state_name": "包装",
+        "order": 1
+      },
+      {
+        "id": 3,
+        "state_id": 12,
+        "state_name": "发货",
+        "order": 2
+      }
+    ]
+  }
+  ```
+
 ### 3.8. 参数与日志接口 (Custom Actions)
 
 #### 3.8.1. 获取状态流转记录列表
@@ -737,7 +768,7 @@ token = response.json()['access']
 # 创建状态
 headers = {'Authorization': f'Bearer {token}'}
 response = requests.post(
-    'http://localhost:8000/api/v1/states/',
+    'http://localhost:8000/api/v1/stateflow/states/',
     json={
         'name': '待审核',
         'description': '等待审核'
@@ -745,26 +776,50 @@ response = requests.post(
     headers=headers
 )
 state = response.json()
+
+# 获取业务对象的流程节点
+business_object_id = 1
+response = requests.get(
+    f'http://localhost:8000/api/v1/stateflow/business-objects/{business_object_id}/process-nodes/',
+    headers=headers
+)
+nodes_data = response.json()
+print(f"流程共有 {nodes_data['count']} 个节点")
+for node in nodes_data['nodes']:
+    print(f"  节点 {node['order']}: {node['state_name']}")
 ```
 
 ### JavaScript (fetch)
 
 ```javascript
 // 获取状态列表
-const response = await fetch('/api/v1/states/?limit=10&offset=0', {
+const response = await fetch('/api/v1/stateflow/states/?limit=10&offset=0', {
   headers: {
     'Authorization': `Bearer ${token}`
   }
 });
 const data = await response.json();
 console.log(data.results);
+
+// 获取业务对象的流程节点
+const businessObjectId = 1;
+const nodesResponse = await fetch(
+  `/api/v1/stateflow/business-objects/${businessObjectId}/process-nodes/`,
+  {
+    headers: {
+      'Authorization': `Bearer ${token}`
+    }
+  }
+);
+const nodesData = await nodesResponse.json();
+console.log(`流程共有 ${nodesData.count} 个节点:`, nodesData.nodes);
 ```
 
 ### curl
 
 ```bash
 # 创建流程
-curl -X POST "http://localhost:8000/api/v1/processes/" \
+curl -X POST "http://localhost:8000/api/v1/stateflow/processes/" \
   -H "Authorization: Bearer <token>" \
   -H "Content-Type: application/json" \
   -d '{
@@ -775,4 +830,8 @@ curl -X POST "http://localhost:8000/api/v1/processes/" \
       {"state_id": 2, "order": 1}
     ]
   }'
+
+# 获取业务对象的流程节点
+curl -X GET "http://localhost:8000/api/v1/stateflow/business-objects/1/process-nodes/" \
+  -H "Authorization: Bearer <token>"
 ```