The broker code moved to an append-only hash-chained audit log
(actor_member_id / actor_display_name / payload / prev_hash / hash
with integer GENERATED ALWAYS AS IDENTITY id) but prod still had
the original 0000-migration shape (actor_peer_id / metadata /
text id). Every peer_joined / peer_left event logged 'audit log
insert failed' — no audit trail captured at all.
Applied manually on prod already; committing the migration so
future environments converge.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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