fix(go): normalize gb32960 realtime vendor fragments

go/vehicle-gateway/internal/realtime/repository.go

@@ -294,6 +294,9 @@ func mergeParsedForProtocol(protocol envelope.Protocol, existing map[string]any,
 	for _, key := range replaceParsedKeys(protocol, incoming) {
 		out[key] = cloneAny(incoming[key])
 	}
+	if protocol == envelope.ProtocolGB32960 {
+		normalizeGB32960RealtimeParsed(out)
+	}
 	return out
 }
 
@@ -404,6 +407,59 @@ func strconvAny(value any) string {
 	}
 }
 
+func normalizeGB32960RealtimeParsed(parsed map[string]any) {
+	units, ok := asAnySlice(parsed["data_units"])
+	if !ok {
+		return
+	}
+	for _, unit := range units {
+		unitMap, ok := unit.(map[string]any)
+		if !ok || strings.TrimSpace(strconvAny(unitMap["name"])) != "gd_fc_stack" {
+			continue
+		}
+		value, ok := unitMap["value"].(map[string]any)
+		if !ok {
+			continue
+		}
+		collapseGDFCStackValue(value)
+	}
+}
+
+func collapseGDFCStackValue(value map[string]any) {
+	summaries, ok := asAnySlice(value["summaries"])
+	if !ok || len(summaries) == 0 {
+		return
+	}
+	collapsed := map[string]any{}
+	for _, item := range summaries {
+		summary, ok := item.(map[string]any)
+		if !ok {
+			continue
+		}
+		for key, fieldValue := range summary {
+			if isGDFCStackFragmentField(key) {
+				continue
+			}
+			collapsed[key] = cloneAny(fieldValue)
+		}
+	}
+	if len(collapsed) == 0 {
+		delete(value, "summaries")
+		return
+	}
+	value["stack_count"] = 1
+	value["summaries"] = []any{collapsed}
+}
+
+func isGDFCStackFragmentField(key string) bool {
+	switch key {
+	case "frame_cell_start", "frame_cell_count", "frame_max_cell_voltage_v", "frame_min_cell_voltage_v":
+		return true
+	default:
+		return false
+	}
+}
+
 func fieldTimes(fields map[string]any, eventMS int64) map[string]int64 {
 	out := make(map[string]int64, len(fields))
 	for key := range fields {