New page: docs/automation/index.md — single entry point for all automation
mechanisms (heartbeat, cron, tasks, hooks, standing-orders, webhooks) with
a decision flowchart and comparison table.
Add "Related" sections to 5 high-traffic pages that were dead ends:
- gateway/heartbeat.md → links to tasks, cron-vs-heartbeat, timezone, troubleshooting
- concepts/session.md → links to multi-agent, tasks, channel-routing
- concepts/multi-agent.md → links to channel-routing, subagents, ACP, presence, session
- concepts/agent-loop.md → links to tools, hooks, compaction, exec-approvals, thinking
- concepts/timezone.md → links to heartbeat, cron-jobs, date-time
Add automation/index to Mintlify nav as first item in Automation group.
e682b72154
