- Add BlockedStateSnapshot typing/export and AgentStore persistence APIs for last blocked heartbeat state
- Deduplicate blocked-task heartbeat comments using blockedBy + context hash, and clear blocked snapshots when tasks are no longer blocked
- Thread triggeringCommentIds/triggeringCommentType through heartbeat execution, wake context, scheduler assignment triggers, and runtime wiring
- Trigger immediate heartbeat runs from task/steering comment routes for assigned immediate-response agents, with validation for comment wake fields on /api/agents/:id/runs
- Expand core, engine, and dashboard tests to cover blocked dedup logic, comment-triggered wakes, validation, and skip scenarios
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