Publish effective LLM backend provenance

internal/framework/pipeline/runner.go

@@ -832,14 +832,18 @@ func mergeLLMProfileManifests(sources ...[]artifacts.LLMProfileManifest) []artif
 			id := strings.TrimSpace(profile.ID)
 			provider := strings.TrimSpace(profile.Provider)
 			model := strings.TrimSpace(profile.Model)
-			key := id + "\x00" + provider + "\x00" + model
+			backendID := strings.TrimSpace(profile.BackendID)
+			reasoningEffort := strings.TrimSpace(profile.ReasoningEffort)
+			key := id + "\x00" + provider + "\x00" + model + "\x00" + backendID + "\x00" + reasoningEffort
 			if _, exists := merged[key]; exists {
 				continue
 			}
 			merged[key] = artifacts.LLMProfileManifest{
-				ID:       id,
-				Provider: provider,
-				Model:    model,
+				ID:              id,
+				Provider:        provider,
+				Model:           model,
+				BackendID:       backendID,
+				ReasoningEffort: reasoningEffort,
 			}
 		}
 	}

internal/framework/pipeline/runner_manifest_test.go

@@ -0,0 +1,29 @@
+package pipeline
+
+import (
+	"reflect"
+	"testing"
+
+	"gitea.maximumdirect.net/eric/notarius/internal/core/artifacts"
+)
+
+func TestMergeLLMProfileManifestsDistinguishesEffectiveTargets(t *testing.T) {
+	got := mergeLLMProfileManifests(
+		[]artifacts.LLMProfileManifest{
+			{ID: "profile", Provider: "promptkit", Model: "model", BackendID: "backend-b", ReasoningEffort: "low"},
+			{ID: " profile ", Provider: " promptkit ", Model: " model ", BackendID: " backend-a ", ReasoningEffort: " low "},
+		},
+		[]artifacts.LLMProfileManifest{
+			{ID: "profile", Provider: "promptkit", Model: "model", BackendID: "backend-a", ReasoningEffort: "high"},
+			{ID: "profile", Provider: "promptkit", Model: "model", BackendID: "backend-a", ReasoningEffort: "low"},
+		},
+	)
+	want := []artifacts.LLMProfileManifest{
+		{ID: "profile", Provider: "promptkit", Model: "model", BackendID: "backend-a", ReasoningEffort: "high"},
+		{ID: "profile", Provider: "promptkit", Model: "model", BackendID: "backend-a", ReasoningEffort: "low"},
+		{ID: "profile", Provider: "promptkit", Model: "model", BackendID: "backend-b", ReasoningEffort: "low"},
+	}
+	if !reflect.DeepEqual(got, want) {
+		t.Fatalf("merged profiles = %#v, want %#v", got, want)
+	}
+}