test(chaos): retry a rejected model's run the way its task marker does

A rejected model asks the user to choose a model (userAction
choose_model) instead of offering the task-level Retry. Its "Model
unavailable" marker offers Retry, which retries that run on the agent.
The config wave now uses that action after it restores the model.

Co-Authored-By: Claude <noreply@anthropic.com>

tests/restart-chaos/config-wave.ts

@@ -254,7 +254,7 @@ function time(value: unknown): number | null {
   return Number.isFinite(at) ? at : null;
 }
 
-/** Use what the task offers: complete a pending connection card, then Retry, then the agent's setup Retry. */
+/** Use what the task offers: complete a pending connection card, then Retry (the task's, or a rejected model's marker), then the agent's setup Retry. */
 async function offeredAction(api: ChaosApi, record: ConfigTaskRecord, resources: TaskResources, current: ConfigSnapshot): Promise<string> {
   const card = current.cards.find(candidate => candidate.status === "pending" && candidate.kind === "connection_intent");
   if (card && resources.connectionId) {
@@ -265,6 +265,12 @@ async function offeredAction(api: ChaosApi, record: ConfigTaskRecord, resources:
     const response = await api.post<Json>(`/api/issues/${record.issueId}/retry`, { idempotencyKey: randomUUID(), observedRunId: current.interruption.observedRunId });
     return `clicked Retry (accepted=${String(response?.accepted)})`;
   }
+  // A rejected model offers Retry on the run's "Model unavailable" marker, which retries that run on the agent.
+  if (current.interruption?.userAction === "choose_model" && current.interruption.observedRunId) {
+    const response = await api.post<Json>(`/api/agents/${resources.agentId}/wakeup`, { source: "on_demand", triggerDetail: "manual",
+      reason: "retry_failed_run", failedRunId: current.interruption.observedRunId });
+    return `clicked the model marker's Retry (run ${String(response?.id ?? "none")})`;
+  }
   if (current.agent && current.agent.lifecycleState !== "ready") {
     await api.post(`/api/agents/${resources.agentId}/lifecycle/retry`, {});
     return `agent setup Retry (lifecycle ${current.agent.lifecycleState})`;