Include local backend target in checkpoint identity

internal/framework/llm/scheduled_client_test.go

@@ -81,7 +81,10 @@ func TestScheduledClientPreservesCheckpointFingerprints(t *testing.T) {
 		t.Fatal(err)
 	}
 	inner := &fingerprintedStructuredClient{
-		fingerprints: []CheckpointFingerprint{{Name: "profile_source", Value: "sha256:one"}},
+		fingerprints: []CheckpointFingerprint{
+			{Name: "profile_source", Value: "sha256:one"},
+			{Name: "backend_target", Value: "sha256:two"},
+		},
 	}
 	client := NewScheduledClient(inner, scheduler)
 	provider, ok := client.(CheckpointFingerprintProvider)
@@ -92,7 +95,9 @@ func TestScheduledClientPreservesCheckpointFingerprints(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if len(got) != 1 || got[0] != inner.fingerprints[0] {
+	if len(got) != len(inner.fingerprints) ||
+		got[0] != inner.fingerprints[0] ||
+		got[1] != inner.fingerprints[1] {
 		t.Fatalf("checkpoint fingerprints = %#v, want %#v", got, inner.fingerprints)
 	}
 }