Revert EMULATOR_MODE to rcon default, restore RCON config

.env.example

@@ -46,8 +46,11 @@ DB_BACKUP_KEEP=7
 # Minutes between repeat health-fail alerts from jobs-worker (default 15).
 HEALTH_ALERT_COOLDOWN_MIN=15
 
-# --- EMULATOR API ---
-EMULATOR_API_URL=http://127.0.0.1:3001
+# --- RCON (Low Latency Loop) ---
+RCON_HOST=127.0.0.1
+RCON_PORT=3003
+EMU_PORT=3004
+RCON_TIMEOUT_MS=2000
 
 # --- EMAIL & NOTIFICATIONS ---
 SMTP_HOST=