Add structured output repair support

internal/framework/llm/promptkit_client_test.go

@@ -667,6 +667,20 @@ func TestPromptKitClientMapsHTTPGenerationErrorToApplicationBoundary(t *testing.
 	}
 }
 
+func TestPromptKitClientRejectsInvalidRepairAttemptOverride(t *testing.T) {
+	for _, attempts := range []int{-1, 4} {
+		t.Run("invalid", func(t *testing.T) {
+			fake := &fakePromptKitLLM{content: `{"ok":true}`}
+			client := newTestPromptKitClient(t, fake)
+			var out map[string]any
+			_, err := client.CompleteStructured(context.Background(), contracts.StructuredCompletionRequest{PromptID: "adapter.test", StructuredOutputRepairAttempts: &attempts}, &out)
+			if err == nil || fake.calls != 0 {
+				t.Fatalf("error=%v calls=%d", err, fake.calls)
+			}
+		})
+	}
+}
+
 func TestPromptKitClientCheckpointFingerprintTracksFallbackProfileAssets(t *testing.T) {
 	fingerprintFor := func(content string) CheckpointFingerprint {
 		t.Helper()