Seerr's checkOverseerrMerge calls Settings.load with raw=true, which
replaces this.data entirely with file contents. If settings.main is
absent (as in our jellyfin-only restore), it crashes at line 418:
'Cannot read properties of undefined (reading apiKey)'.
restore.js now ensures settings.main exists and mediaServerType=JELLYFIN,
which both prevents the crash and causes checkOverseerrMerge to return
early (migration already done).
Init container detects if Jellyfin apiKey is missing and restores
it from the seerr-defaults ConfigMap. Prevents config loss on pod
restarts or when the Jellyfin API key fails validation.
Will Anderson