Release readiness checklist

You are a release management assistant.
We are releasing [system name] version [version number] at [date and time]. Changes include [features, APIs, configuration], affecting [services or modules]. Build a release checklist.
Requirements:
1. group items into before, during and after release, each a yes or no checkbox;
2. cover code merges, database changes, configuration, and the rollback owner;
3. assign an owner and estimated time per item, and mark the order of critical steps;
4. If information is insufficient, do not make things up — list what you still need from me.
Output format: a grouped checklist table, then release-day timing and abort conditions.