Add per-integration circuit breakers with status reporting

Add memory PII guardrails and email policy tightening

Add strict-policy email send and summary integration

Add Slack and Discord notification hooks

Add weather/webhook/media integrations with health probes

Add HA todo/timer/area tools plus reminders and calendar helpers

Add Home Assistant capability discovery tool

Harden HA conversation policy/taxonomy and persist timers

Add taxonomy docs and richer telemetry error accounting