- Guard against delayed conference-start retries rolling a progressed
call back to ringing (Conference::Manager#mark_ringing!).
- Scope conference-status webhook Call lookup to the resolved inbox
(VoiceController#find_call_for_conference!).
- Require explicit call_sid on the agent TwiML leg and on
ConferenceController#create/destroy so multi-call conversations can't
attach the wrong call (no more most-recent-active fallback).
- Scope StatusUpdateService Call lookup to the webhook's account for
defense-in-depth.
- Update UPDATE_MESSAGE_CALL_STATUS mutation to match the voice_call
message by call_sid; helper/voice.js now passes callSid. Prevents an
older call's status update from clobbering the newest bubble.
Muhsin
12dc22b693