Update policy so transient errors are not marked terminal (#26066)

packages/core/src/availability/policyCatalog.test.ts

@@ -56,7 +56,7 @@ describe('policyCatalog', () => {
   it('marks preview transients as sticky retries', () => {
     const [previewPolicy] = getModelPolicyChain({ previewEnabled: true });
     expect(previewPolicy.model).toBe(PREVIEW_GEMINI_MODEL);
-    expect(previewPolicy.stateTransitions.transient).toBe('terminal');
+    expect(previewPolicy.stateTransitions.transient).toBe('sticky_retry');
   });
 
   it('applies default actions and state transitions for unspecified kinds', () => {

packages/core/src/availability/policyCatalog.ts

@@ -50,7 +50,7 @@ export const SILENT_ACTIONS: ModelPolicyActionMap = {
 
 const DEFAULT_STATE: ModelPolicyStateMap = {
   terminal: 'terminal',
-  transient: 'terminal',
+  transient: 'sticky_retry',
   not_found: 'terminal',
   unknown: 'terminal',
 };