Align item occurrence evidence fields

internal/modules/dnd/extract/itemoccurrences/prompt_assets_test.go

@@ -43,6 +43,19 @@ func TestPromptAssetsPrepareItemOccurrencePrompt(t *testing.T) {
 	if prepared.PromptID != PromptID || prepared.OutputContract.SchemaPath != "dnd_item_occurrences_llm.v1.json" {
 		t.Fatalf("prepared prompt = %#v", prepared)
 	}
+	rendered := make([]string, len(prepared.Messages))
+	for index, message := range prepared.Messages {
+		rendered[index] = message.Content
+	}
+	content := strings.Join(rendered, "\n")
+	for _, field := range []string{"start_unit_id", "end_unit_id", "source_id"} {
+		if !strings.Contains(content, field) {
+			t.Fatalf("prepared prompt does not include shared evidence field %q", field)
+		}
+	}
+	if strings.Contains(content, "start_segment") || strings.Contains(content, "end_segment") {
+		t.Fatalf("prepared prompt contains obsolete segment evidence fields: %s", content)
+	}
 }
 
 func TestPromptAssetsDoNotLeakIntoMetadata(t *testing.T) {