When gosentry.json / jobs.json are absent, read a pre-migration
gosentry.yaml / jobs.yaml via private yaml-tagged shadow structs and
return the data unsaved; the existing SaveConfig/SaveJobs in OpenStore
then rewrite it as JSON. Replaces the placeholder that pointed configPath
at the legacy YAML file and tried to json.Unmarshal it.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>