A decision request (/v1/systemone, /v1/decisions) sends Score with
question_type "systemone". A backend built before native decisions ignores
that field and runs plain scoring, so the caller saw "Score was not enabled"
(500) or "candidates must be non-empty" (400). The gallery "latest" image can
lag behind the server, and the upgrade check compares only tag, version and
digest, so /backends/upgrades did not list the backend.
Recognise those two errors for a decision request, return 501 with a message
that says the backend is older than the server and must be upgraded, and mark
the backend stale. The upgrade check now reports a marked backend with a
`reason`, and refreshes at once. Reinstalling the backend drops the mark; if
the new image is still old, the next request marks it again. Model loading is
not affected.
Refreshing the "latest" backend image is a separate publishing step and is
not part of this change.
Refs #12693
Assisted-by: Claude Code:claude-sonnet-5-5 [go vet] [go test]
Signed-off-by: Ettore Di Giacinto <mudler@localai.io>
Co-authored-by: Ettore Di Giacinto <mudler@localai.io>
