The new entry-side guard in delete_session/delete_sessions called
_write_guards_reject without allow_closed_compression_parent=True, so
_check_transcript_write_guards raised CompressionSessionClosedError for any
row with end_reason='compression'. That type is not caught by
_write_guards_reject, so every user-facing delete of a compressed parent
500'd and a bulk delete containing one rolled back the whole batch.
Pass the flag at both sites, matching prune (hermes_state_maintenance.py).
The lease is keyed on the lineage root, so a live turn on the tip still
blocks deleting its ancestor. Test 1 gains a compression-ended case (red on
the pre-fold file).
adacbcc5fc