feat: schedules UI, task cron type, monthly/yearly schedules, AE DB tools, integrations page

- Schedules web UI (/settings/crons): list, add, edit, pause/resume, delete jobs
- cron task type: full orchestrator tool loop on a schedule, result → notification channel
- parse_schedule: monthly/yearly formats (monthly:DD:HH:MM, yearly:MM:DD:HH:MM)
- HA inbound webhook tools toggle: orchestrator loop vs. direct LLM, configurable in UI
- ae_db_query/describe/show_view: SELECT-only Aether MariaDB access (admin, per-user creds)
- /settings/integrations: admin-only page for Aether DB credentials
- Schedules nav link added to all settings pages
- pymysql added to requirements
- Docs updated: HELP.md, MASTER.md, CLAUDE.md

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

cortex/requirements.txt

@@ -28,5 +28,8 @@ openai>=1.0.0
 # Web Push / VAPID — browser push notifications
 pywebpush>=2.0.0
 
+# MariaDB / MySQL connector — used by ae_db_query orchestrator tool
+pymysql>=1.1.0
+
 # anthropic SDK not needed — using claude CLI subprocess for auth
 # anthropic>=0.40.0