Queued after Gitea #86. Drops the reported_birth_time immutability in chart_profiles_guard_birth (copied from the owner guard that was lifted on 07-21); active_* locks stay. Not for the agent loop: touches the database. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01HwMNZEzdzmrbPhuRNmZe3C