feat: identify action items (#790)

* Identify action items

* Add action items to mock summary

* Add action items validator

* Remove final prefix from action items

* Make on action items callback required

* Don't mutation action items response

* Assign action items to none on error

* Use timeout constant

* Exclude action items from transcript list

server/reflector/views/transcripts.py

@@ -501,6 +501,7 @@ async def transcript_get(
         "title": transcript.title,
         "short_summary": transcript.short_summary,
         "long_summary": transcript.long_summary,
+        "action_items": transcript.action_items,
         "created_at": transcript.created_at,
         "share_mode": transcript.share_mode,
         "source_language": transcript.source_language,