store subprocesses for spiff steps as well and do not save file as primary if one is already set w/ burnettk

spiffworkflow-backend/src/spiffworkflow_backend/routes/process_api_blueprint.py

@@ -1433,7 +1433,8 @@ def process_instance_task_list(
         )
         if step_detail is not None and process_instance.bpmn_json is not None:
             bpmn_json = json.loads(process_instance.bpmn_json)
-            bpmn_json["tasks"] = step_detail.task_json
+            bpmn_json["tasks"] = step_detail.task_json['tasks']
+            bpmn_json["subprocesses"] = step_detail.task_json['subprocesses']
             process_instance.bpmn_json = json.dumps(bpmn_json)
 
     processor = ProcessInstanceProcessor(process_instance)

spiffworkflow-backend/src/spiffworkflow_backend/services/process_instance_processor.py

@@ -551,7 +551,10 @@ class ProcessInstanceProcessor:
         """SaveSpiffStepDetails."""
         bpmn_json = self.serialize()
         wf_json = json.loads(bpmn_json)
-        task_json = wf_json["tasks"]
+        task_json = {
+            "tasks": wf_json["tasks"],
+            "subprocesses": wf_json["subprocesses"]
+        }
 
         return {
             "process_instance_id": self.process_instance_model.id,

spiffworkflow-backend/src/spiffworkflow_backend/services/spec_file_service.py

@@ -167,7 +167,7 @@ class SpecFileService(FileSystemService):
         for ref in references:
             # If no valid primary process is defined, default to the first process in the
             # updated file.
-            if not primary_process_ref and ref.type == "process" and ref.is_executable:
+            if not process_model_info.primary_file_name and not primary_process_ref and ref.type == "process" and ref.is_executable:
                 ref.is_primary = True
 
             if ref.is_primary: