[Fix] Fix Prediction Spinner, ensure proper pathway status is set

Fixes Spinner and status message display on pathway page

Reviewed-on: enviPath/enviPy#291
Co-authored-by: Tobias O <tobias.olenyi@envipath.com>
Co-committed-by: Tobias O <tobias.olenyi@envipath.com>

epdb/legacy_api.py

@@ -1451,6 +1451,7 @@ def create_pathway(
                 setting = SettingManager.get_setting_by_url(request.user, pw.selectedSetting)
 
             new_pw.setting = setting
+            new_pw.kv.update({"status": "running"})
             new_pw.save()
 
             from .tasks import dispatch, predict