A chain is checked for nested chains when it is saved, but not when
one of its targets is later edited into a chain. Requests then served
the inner chain's config as the target, which has no backend and
triggers backend auto-detection.
Mark such a target missing so no plan picks it, and skip it without a
trip in the HTTP path when it is pinned.
Signed-off-by: Ettore Di Giacinto <mudler@localai.io>
Assisted-by: Claude:claude-opus-5-5 [Claude Code]
Ettore Di Giacinto
00bd5ee121