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/.env.example

@@ -93,6 +93,18 @@ AE_API_KEY=
 AE_ACCOUNT_ID=
 AE_API_TIMEOUT=15
 
+# ── Aether MariaDB (direct — SELECT-only via ae_db_query/describe/show_view tools) ─
+# Configured per-user in home/{username}/channels.json — NOT in .env.
+# Add this block to the user's channels.json to enable the tools:
+#
+#   "aether_db": {
+#       "host":     "192.168.64.5",
+#       "port":     3306,
+#       "name":     "aether_dev",
+#       "user":     "aether_dev",
+#       "password": "..."
+#   }
+
 # ── Distillation schedule ────────────────────────────────────────────────────
 SCHEDULER_TIMEZONE=America/New_York
 AUTO_DISTILL=true