Add orch wait command

docs/roadmaps/archive/orch-wait.md

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+# Orch Wait
+
+## Status
+
+- `completed`
+
+## Owner
+
+- codex
+
+## Started At
+
+- `2026-03-19`
+
+## Goal
+
+- implement `orch wait` so the leader can block on run-scoped task events instead of manual sleep loops
+
+## Scope
+
+- add store support for waiting on run-scoped events with event-type filters and timeout behavior
+- make `orch wait` reconcile inbox state while polling so worker transitions can surface as `task_*` events
+- add integration tests for wake and timeout behavior
+- update the implementation roadmap and archive this workstream when complete
+
+## Checklist
+
+- [x] inspect `orch wait` docs and current event/reconcile behavior
+- [x] implement `orch wait` store and CLI layers
+- [x] add integration coverage for wake and timeout paths
+- [x] run `go test ./...`
+- [x] update `docs/implementation-roadmap.md`
+- [x] archive this roadmap with a completion summary
+
+## Files
+
+- `docs/roadmaps/archive/orch-wait.md`
+- `docs/implementation-roadmap.md`
+- `internal/cli/orch/root.go`
+- `internal/cli/orch/wait.go`
+- `internal/cli/orch/integration_test.go`
+- `internal/store/orch.go`
+
+## Decisions
+
+- let `orch wait` perform reconcile while polling so a leader can wait directly on `task_*` events without a separate manual reconcile loop
+
+## Blockers
+
+- none
+
+## Next Step
+
+- implement the remaining leader-side scheduler controls: `retry`, `reassign`, `cancel`, and `cleanup`
+
+## Completion Summary
+
+- `orch wait` now blocks on run-scoped `task_*` events with `--for`, `--after-event`, and timeout support
+- the wait loop reconciles inbox state while polling, so worker thread transitions can wake the leader without a separate manual reconcile step
+- integration tests now cover both wake-on-blocked and timeout behavior