If Meta delivered a connect for an outbound call before the controller
committed the Call row (race between Meta's API response and our INSERT),
the handler treated the unknown call_id as inbound and either tripped the
unique (provider, provider_call_id) index or broadcast voice_call.incoming
for an outbound. Use session.sdp_type to gate inbound creation on 'offer'
only; 'answer' with no row is logged and skipped — the next status webhook
finds the now-committed row.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
