no-mistakes: apply CI fixes

Author: ruby-dlee

bin/fm-spawn.sh

@@ -1591,6 +1591,7 @@ spawn_abort_cleanup() {
       spawn_return_created_worktree || worktree_clean=0
     else
       worktree_clean=0
+      [ "$WORKTREE_RETAIN_ON_ABORT" != 1 ] || spawn_return_created_worktree || true
       echo "warning: retained failed spawn resources for ${ID:-unknown} because prior task state could not be restored" >&2
     fi
     [ "$worktree_clean" = 1 ] || echo "warning: failed to return rollback worktree for ${ID:-unknown}" >&2