feat: Enforce 1 user 1 connection for X-ray and fix active stats speed

migrations/053_split_speed.sql

@@ -0,0 +1,3 @@
+ALTER TABLE vpn_clients ADD COLUMN speed_up BIGINT DEFAULT 0 AFTER current_speed;
+ALTER TABLE vpn_clients ADD COLUMN speed_down BIGINT DEFAULT 0 AFTER speed_up;
+-- We can drop current_speed later or keep it as total