update dispatch_obsgroup_detector: append task only if success

csst_dag/dag/_dispatcher.py

@@ -345,6 +345,7 @@ class Dispatcher:
             this_instrument = this_obsgroup_plan_basis["instrument"][0]
             effective_detector_names = csst[this_instrument].effective_detector_names
 
+            # loop over effective detectors
             for this_effective_detector_name in effective_detector_names:
                 this_task = dict(
                     dataset=this_obsgroup_plan_basis["dataset"][0],
@@ -386,7 +387,8 @@ class Dispatcher:
                 # set n_file_expected and n_file_found
                 this_task["n_file_expected"] = n_file_expected
                 this_task["n_file_found"] = n_file_found
-                # append this task
+                # append this task if this_success
+                if this_success:
                     task_list.append(
                         dict(
                             task=this_task,