store bpmn_file_relative_path using correct slashes w/ burnettk

spiffworkflow-backend/src/spiffworkflow_backend/models/process_model.py

@@ -2,6 +2,7 @@
 from __future__ import annotations
 
 import enum
+import os
 from dataclasses import dataclass
 from dataclasses import field
 from typing import Any
@@ -50,6 +51,10 @@ class ProcessModelInfo:
             return True
         return False
 
+    # for use with os.path.join so it can work on windows
+    def id_for_file_path(self) -> str:
+        return self.id.replace("/", os.sep)
+
 
 class ProcessModelInfoSchema(Schema):
     """ProcessModelInfoSchema."""

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

@@ -375,7 +375,7 @@ class SpecFileService(FileSystemService):
         process_model_info: ProcessModelInfo, bpmn_file_name: str, et_root: _Element
     ) -> None:
         """Store_bpmn_process_identifiers."""
-        relative_process_model_path = process_model_info.id
+        relative_process_model_path = process_model_info.id_for_file_path()
 
         relative_bpmn_file_path = os.path.join(
             relative_process_model_path, bpmn_file_name