feat: persist authenticated queue probe RTT

server/store/queue_sql.go

@@ -137,6 +137,28 @@ type queueTicketRecord struct {
 
 type PostgresQueue struct{ DB *sql.DB }
 
+const QueueProbeRecordSQL = `UPDATE queue_tickets
+SET predicted_rtt = jsonb_set(COALESCE(predicted_rtt, '{}'::jsonb), ARRAY[$2], to_jsonb($3::double precision), true)
+WHERE player_id = $1 AND state IN ('QUEUED', 'PROPOSED') AND expires_at > $4`
+
+func (q PostgresQueue) RecordProbe(ctx context.Context, playerID, region string, rtt time.Duration, now time.Time) error {
+	if q.DB == nil || playerID == "" || (region != "EU" && region != "NA") || rtt < 0 || now.IsZero() {
+		return fmt.Errorf("invalid probe recording")
+	}
+	result, err := q.DB.ExecContext(ctx, QueueProbeRecordSQL, playerID, region, float64(rtt)/float64(time.Millisecond), now)
+	if err != nil {
+		return err
+	}
+	changed, err := result.RowsAffected()
+	if err != nil {
+		return err
+	}
+	if changed == 0 {
+		return domain.ErrTicketNotFound
+	}
+	return nil
+}
+
 func (q PostgresQueue) Create(ctx context.Context, playerID, ticketID, idempotencyKey string, spec domain.QueueSpec, now time.Time) (domain.QueueTicket, error) {
 	return CreateQueueTicket(ctx, q.DB, ticketID, playerID, idempotencyKey, spec, now)
 }