[v25.3.x] direct_consumer: move offset update logic to fetch_next#29467

bharathv merged 9 commits into

v25.3.xredpanda-data/redpanda:v25.3.xfrom

manual-backport-28309-v25.3.xredpanda-data/redpanda:manual-backport-28309-v25.3.xCopy head branch name to clipboard