`hasUnresolvedWaitStatesForAgent` only joined through tasks, so
approval-only threads and ad-hoc threads where the agent is the
requesting party or an explicit participant were invisible. Result:
the heartbeat scheduler silently resumed agents that the board had
asked to wait on, Co-Founder approval chains deadlocked on the
agent side, and any new gate that relies on the query inherits the
same hole.
Root-fix the query at the SQL layer. `hasUnresolvedWaitStateForAgent`
now returns true when any of the three ownership predicates hold:
- task thread whose task.assignee_agent_id = agent
- approval thread whose approval.requested_by_agent_id = agent
- any thread on which the agent is a recorded participant
Each branch is an EXISTS subquery so the query short-circuits on
first match. The thread-integration helper delegates here so the
heartbeat scheduler and the `beforeToolCall` gate share one source
of truth rather than reimplementing half-policies in parallel.
ZacharyZhang-NY