refactor: Extract get_recent_topic_activity.
refactor: Extract get_recent_topic_activity.

punchagan/zulip,zulip/zulip,andersk/zulip,rht/zulip,andersk/zulip,eeshangarg/zulip,zulip/zulip,zulip/zulip,showell/zulip,andersk/zulip,zulip/zulip,kou/zulip,punchagan/zulip,andersk/zulip,eeshangarg/zulip,zulip/zulip,showell/zulip,showell/zulip,punchagan/zulip,andersk/zulip,showell/zulip,rht/zulip,eeshangarg/zulip,hackerkid/zulip,kou/zulip,showell/zulip,rht/zulip,punchagan/zulip,rht/zulip,showell/zulip,hackerkid/zulip,kou/zulip,andersk/zulip,punchagan/zulip,zulip/zulip,rht/zulip,eeshangarg/zulip,hackerkid/zulip,kou/zulip,hackerkid/zulip,rht/zulip,hackerkid/zulip,rht/zulip,kou/zulip,hackerkid/zulip,eeshangarg/zulip,eeshangarg/zulip,punchagan/zulip,zulip/zulip,hackerkid/zulip,kou/zulip,andersk/zulip,punchagan/zulip,showell/zulip,eeshangarg/zulip,kou/zulip