Step 5 of the rust-orchestrator migration. New file boot_reconciler.rs holds a
small Tokio task that calls ProdContainerOrchestrator::reconcile_all() on a
30-second cadence (answered design Q3).
* BootReconciler::new(orch, interval, shutdown) — shutdown is an Arc<Notify>
so callers can trigger a graceful exit without pulling in tokio-util.
* run_forever(self) — does one reconcile immediately, then loops on
tokio::select! { sleep_until | shutdown.notified() }. Shutdown interrupts
the sleep but never an in-flight reconcile_all call.
* Per-pass outcomes are logged at debug/warn; failures never propagate out
because reconcile_all already absorbs per-app errors into ReconcileReport.
Four tokio::test(start_paused = true) tests verify the loop cadence against a
CountingRuntime test double:
* initial_pass_fires_immediately — first reconcile runs with no delay
* second_pass_fires_after_interval — second pass fires after exactly
interval elapses in paused-clock time
* shutdown_terminates_loop — notify_one() lets run_forever return
* failure_in_one_pass_does_not_stop_loop — the loop keeps ticking even when
the first pass had to install a missing container
Not wired into main.rs yet — that is Step 6. Re-exported from container::mod
as BootReconciler + RECONCILER_DEFAULT_INTERVAL for the wire-up step.
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