Three early-return paths in #runAutoCompaction emitted auto_compaction_end
with result=undefined, aborted=false, and no errorMessage when compaction
was legitimately not needed (no model selected, no candidate models
available, or nothing to compact yet). The event-controller had no way to
distinguish these benign skips from a genuine failure, and fell through to
show the warning:
'Auto context-full maintenance failed; continuing without maintenance'
This was visible after a successful compaction: the next threshold check
would find nothing new to compact (prepareCompaction returns null), emit a
soft-skip event, and trigger the false warning.
Add skipped?: boolean to the auto_compaction_end event type and set it on
the three soft-skip paths. Update the event-controller to treat skipped
events as silent no-ops. Propagate the field through the extension and
hook AutoCompactionEndEvent interfaces so extensions can observe the
distinction.
