Release v0.28.1

What's Changed

• refactor(listener): centralize turn lifecycle ownership by @cpacker in #3301
• feat(dream): allow reflection model override by @kl2806 in #3306
• fix(channels): prompt Slack acknowledgements for long work by @overlord-letta in #3307
• chore: bump version to 0.28.1 by @github-actions[bot] in #3309

Full Changelog: v0.28.0...v0.28.1