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/main.py

@@ -9,7 +9,7 @@ logging.basicConfig(level=logging.INFO, format="%(levelname)s:%(name)s: %(messag
 from config import settings
 from auth_middleware import SessionAuthMiddleware
 from routers import chat, google_chat, nextcloud_talk, homeassistant, files, distill, auth, orchestrator
-from routers import ui, onboarding, settings, tools_settings, help, auth_google, local_llm, push, audit, usage
+from routers import ui, onboarding, settings, tools_settings, help, auth_google, local_llm, push, audit, usage, crons
 
 
 @asynccontextmanager
@@ -53,6 +53,7 @@ app.include_router(onboarding.router)
 app.include_router(settings.router)
 app.include_router(tools_settings.router)
 app.include_router(local_llm.router)
+app.include_router(crons.router)
 
 # Help page
 app.include_router(help.router)