One conflict, gateway/relay/adapter.py send_for_platform: main added the
turn-final draft-seal interception (_sfp_metadata with the _interim_send
marker stripped, seal-or-fall-through); this branch added format-hint
stamping on the same frame. COMPOSED: the plain-send frame now stamps
_with_format_hints_for_platform over _sfp_metadata (the stripped copy),
so both the seal fall-through contract and the cron-lane block hints
hold. Note: the seal frame itself (op:draft final) does not stamp hints
— cron sends are never open drafts, so the flagship path is unaffected;
noted as a connector-PR follow-up for streamed interactive finals.