fix(glossary): 绑定 QA identity 与人工 override

internal/backendrpc/client.go

@@ -513,6 +513,7 @@ type GlossaryTermSnapshot struct {
 
 // GlossaryOverride records explicit human approval for a deviation.
 type GlossaryOverride struct {
+	QAIdentity           string `json:"qa_identity"`
 	Reviewer             string `json:"reviewer"`
 	Reason               string `json:"reason"`
 	Provenance           string `json:"provenance"`

internal/backendrpc/client_test.go

@@ -464,6 +464,7 @@ func TestTranslationTaskUpdateSendsWorkerParams(t *testing.T) {
 			SourceText:     "source",
 			TranslatedText: "译文",
 			GlossaryOverride: &GlossaryOverride{
+				QAIdentity:           "gqa-v1-test",
 				Reviewer:             "reviewer",
 				Reason:               "approved deviation",
 				Provenance:           "manual-review",