Alert rules are profile-scoped and read metric buckets, which now live
on the profile actor (ticket 104) rather than the primary. alert_states
and the per-line evaluate_alerts/deliver_for_rule calls move from the
primary's Ingest arm to the profile actor's per-line loop, evaluated
against its own snapshot right after that line's apply_all_metrics
publishes -- matching the primary's original per-message publish-then-
evaluate ordering. The primary's run() no longer needs a SettingsHandle
at all now that alerts are gone from its Ingest arm; settings (for
alert rules and ntfy config, read fresh per line) moves to
engine::profile::spawn instead.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TeyhRfMYjMditek6geDRoQ
