fix(auth): distinguish revoked API keys from transient auth errors (#25754)

Merged via /review-pr -> /prepare-pr -> /merge-pr.

Prepared head SHA: 8f9c07a200
Co-authored-by: rrenamed <87486610+rrenamed@users.noreply.github.com>
Co-authored-by: gumadeiras <5599352+gumadeiras@users.noreply.github.com>
Reviewed-by: @gumadeiras

src/commands/models/list.probe.test.ts

@@ -0,0 +1,22 @@
+import { describe, expect, it } from "vitest";
+import { mapFailoverReasonToProbeStatus } from "./list.probe.js";
+
+describe("mapFailoverReasonToProbeStatus", () => {
+  it("maps auth_permanent to auth", () => {
+    expect(mapFailoverReasonToProbeStatus("auth_permanent")).toBe("auth");
+  });
+
+  it("keeps existing failover reason mappings", () => {
+    expect(mapFailoverReasonToProbeStatus("auth")).toBe("auth");
+    expect(mapFailoverReasonToProbeStatus("rate_limit")).toBe("rate_limit");
+    expect(mapFailoverReasonToProbeStatus("billing")).toBe("billing");
+    expect(mapFailoverReasonToProbeStatus("timeout")).toBe("timeout");
+    expect(mapFailoverReasonToProbeStatus("format")).toBe("format");
+  });
+
+  it("falls back to unknown for unrecognized values", () => {
+    expect(mapFailoverReasonToProbeStatus(undefined)).toBe("unknown");
+    expect(mapFailoverReasonToProbeStatus(null)).toBe("unknown");
+    expect(mapFailoverReasonToProbeStatus("model_not_found")).toBe("unknown");
+  });
+});