Mirror the write-side _find_anchor_scene_message ambiguity guard on the read side:
_hydrate_anchor_activity_scenes now counts ref occurrences and skips ref-based
attachment for any ref resolving to >1 assistant message (falls through to the
positional index match), so a duplicate content-digest ref can't double-render the
same worklog scene. Low-severity defense-in-depth on the crown-jewel render surface.
Co-authored-by: franksong2702 <franksong2702@users.noreply.github.com>
nesquena-hermes
81a4945be8