Extracts the realtime co-agent observability run id from an AIAgentSession.Config_ JSON blob (the
coAgentRunID a voice session persists). Returns undefined for a missing/non-voice/un-parseable
config — goal-run observability is best-effort and degrades to "no parent run" cleanly.
Extracts the realtime co-agent observability run id from an
AIAgentSession.Config_JSON blob (thecoAgentRunIDa voice session persists). Returnsundefinedfor a missing/non-voice/un-parseable config — goal-run observability is best-effort and degrades to "no parent run" cleanly.