Allow review of backed research answers

Reviewed-on: #401

cmd/core-runtime/main.go

@@ -999,7 +999,13 @@ func main() {
 				ConfidenceMillis:       semantic.Interpretation.ConfidenceMillis,
 			})
 			cancelReview()
-			stableSemanticReply := mediaAttempted || identityReply != "" || memoryInstructionReply != "" || creativeReply != "" || (creativeFallbackReply != "" && !cognitiveAvailable) || semantic.InformationRequestKind != "" || locationReply != "" || deterministicSpeechAct == interaction.SpeechActConversational || deterministicSpeechAct == interaction.SpeechActConfirmation || deterministicSpeechAct == interaction.SpeechActRejection
+			// A source-backed research result is owned by the research capability,
+			// but its wording is not canonical state. Let the cognitive editor turn
+			// it into a useful human answer while reviewPreservesResearchEvidence
+			// still requires the source evidence to remain present. Information
+			// requests without research (identity, channel state and so on) remain
+			// stable semantic replies and cannot be rewritten here.
+			stableSemanticReply := mediaAttempted || identityReply != "" || memoryInstructionReply != "" || creativeReply != "" || (creativeFallbackReply != "" && !cognitiveAvailable) || (semantic.InformationRequestKind != "" && !(researchAttempted && researchBacked)) || locationReply != "" || deterministicSpeechAct == interaction.SpeechActConversational || deterministicSpeechAct == interaction.SpeechActConfirmation || deterministicSpeechAct == interaction.SpeechActRejection
 			if reviewErr != nil {
 				log.Printf("cognitive response review unavailable: %v", reviewErr)
 			} else if reviewMayReplacePlanningReply(stableSemanticReply, stableKnowledgeReply, researchAttempted, researchBacked, reviewedReply, planningReply) {

cmd/core-runtime/main_test.go

@@ -138,6 +138,11 @@ func TestResponseReviewPreservesAttemptedResearchOutcome(t *testing.T) {
 	if !reviewMayReplacePlanningReply(true, true, false, false, "Санкт-Петербург — город в России.", "Меня зовут Домовой. Санкт-Петербург — город в России.") {
 		t.Fatal("stable-knowledge draft must be eligible for semantic quality review")
 	}
+	// The caller must not mark a source-backed research result as immutable
+	// semantic state: it may be rewritten, but only with its evidence retained.
+	if !reviewMayReplacePlanningReply(false, false, true, true, "Из Москвы в Сочи можно добраться самолётом или поездом. Источник: https://example.test", "Сырые результаты. Источник: https://example.test") {
+		t.Fatal("source-backed research draft must be eligible for human-facing review")
+	}
 }
 
 func TestBearerTokenRequiresBearerScheme(t *testing.T) {