feat(bpm): add admin cancel process instance functionality

- Added admin-cancel endpoint in BpmProcessInstanceController
- Implemented adminCancelProcessInstance method in service layer
- Added permission check for admin cancel operation
- Handled both active and historic process instance cancellation
- Updated bill approval status after cancellation
- Added corresponding service method declaration in interface

jeelowcode-service/jeelowcode-service-bpm-biz/src/main/java/com/jeelowcode/service/bpm/controller/BpmProcessInstanceController.java

@@ -84,4 +84,12 @@ public class BpmProcessInstanceController extends BaseController {
         return success(true);
     }
 
+    @DeleteMapping("/admin-cancel")
+    @Operation(tags = "流程管理", summary = "管理员取消流程实例", description = "管理员强制取消任意流程实例")
+    @PreAuthorize("@ss.hasPermission('bpm:process-instance:admin-cancel')")
+    public CommonResult<Boolean> adminCancelProcessInstance(@Valid @RequestBody BpmProcessInstanceCancelReqVO cancelReqVO) {
+        processInstanceService.adminCancelProcessInstance(getLoginUserId(), cancelReqVO);
+        return success(true);
+    }
+
 }

jeelowcode-service/jeelowcode-service-bpm-biz/src/main/java/com/jeelowcode/service/bpm/service/IBpmProcessInstanceService.java

@@ -111,6 +111,14 @@ public interface IBpmProcessInstanceService {
      */
     void cancelProcessInstance(Long userId, @Valid BpmProcessInstanceCancelReqVO cancelReqVO);
 
+    /**
+     * 管理员取消流程实例
+     *
+     * @param adminUserId  管理员用户编号
+     * @param cancelReqVO 取消信息
+     */
+    void adminCancelProcessInstance(Long adminUserId, @Valid BpmProcessInstanceCancelReqVO cancelReqVO);
+
     /**
      * 获得历史的流程实例
      *