fix: #2940 emit RealtimeHistoryUpdated on transcript_delta#3086

Quratulain-bilal wants to merge 9 commits intoopenai:mainopenai/openai-agents-python:mainfrom

Quratulain-bilal:fix/realtime-transcript-delta-history-updatedQuratulain-bilal/openai-agents-python:fix/realtime-transcript-delta-history-updatedCopy head branch name to clipboard