fix: correct inaccuracies and add sidebar entry for cron troubleshooting guide

- Fix job state display: [active] not scheduled
- Fix CLI mode claim: only gateway fires cron, not CLI sessions
- Expand delivery targets table (5 → 10+ platforms with platform:chat_id syntax)
- Fix disabled toolsets: cronjob, messaging, and clarify (not just cronjob)
- Remove nonexistent 'hermes skills sync' command reference
- Fix log file path: agent.log/errors.log, not scheduler.log
- Fix execution model: sequential, not thread pool concurrent
- Fix 'hermes cron run' description: next tick, not immediate
- Add inactivity-based timeout details (HERMES_CRON_TIMEOUT)
- Add sidebar entry in sidebars.ts under Guides & Tutorials

website/sidebars.ts

@@ -143,6 +143,7 @@ const sidebars: SidebarsConfig = {
         'guides/use-voice-mode-with-hermes',
         'guides/build-a-hermes-plugin',
         'guides/automate-with-cron',
+        'guides/cron-troubleshooting',
         'guides/work-with-skills',
         'guides/delegation-patterns',
         'guides/migrate-from-openclaw',