feat(go): reuse parsed fields across projections

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

@@ -348,20 +348,10 @@ func (r *Repository) setJSON(ctx context.Context, key string, value any, ttl tim
 }
 
 func (r *Repository) setKV(ctx context.Context, vin string, env envelope.FrameEnvelope, parsed map[string]any) error {
-	rows := realtimeKVFields(env, parsed)
-	if len(rows) == 0 {
-		return nil
-	}
-	values := make(map[string]any, len(rows))
-	types := make(map[string]any, len(rows))
-	for _, row := range rows {
-		field := realtimeKVFieldPath(row.Domain, row.Field)
-		if field == "" {
-			continue
-		}
-		values[field] = row.Value
-		types[field] = row.ValueType
+	if len(env.ParsedFields) == 0 && len(parsed) > 0 {
+		env.Parsed = parsed
 	}
+	values, types := realtimeKVMapsForEnvelope(env)
 	if len(values) == 0 {
 		return nil
 	}
@@ -383,8 +373,7 @@ func (r *Repository) setKV(ctx context.Context, vin string, env envelope.FrameEn
 }
 
 func (r *Repository) setFastProjection(ctx context.Context, vehicleKey string, vin string, env envelope.FrameEnvelope) error {
-	rows := realtimeKVFields(env, env.Parsed)
-	values, types := realtimeKVMaps(rows)
+	values, types := realtimeKVMapsForEnvelope(env)
 	eventTimeMS := eventTimeOrReceivedMS(env)
 	offlineAfterMS := env.ReceivedAtMS + r.cfg.ttl().Milliseconds()
 	online := OnlineStatus{
@@ -435,6 +424,30 @@ func (r *Repository) setFastProjection(ctx context.Context, vehicleKey string, v
 	return err
 }
 
+func realtimeKVMapsForEnvelope(env envelope.FrameEnvelope) (map[string]any, map[string]any) {
+	if fields, fieldTypes, ok := ParsedFieldsForEnvelope(env); ok {
+		values := make(map[string]any, len(fields))
+		types := make(map[string]any, len(fields))
+		for field, value := range fields {
+			if strings.TrimSpace(field) == "" {
+				continue
+			}
+			stringValue, valueType, ok := stringifyKVValue(value)
+			if !ok {
+				continue
+			}
+			values[field] = stringValue
+			if typed := strings.TrimSpace(fieldTypes[field]); typed != "" {
+				types[field] = typed
+			} else {
+				types[field] = valueType
+			}
+		}
+		return values, types
+	}
+	return nil, nil
+}
+
 func realtimeKVMaps(rows []RealtimeKVField) (map[string]any, map[string]any) {
 	values := make(map[string]any, len(rows))
 	types := make(map[string]any, len(rows))