fix: 배터리 폴링(5초 msn) 제거 — 측정 간섭 방지

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/src/main/java/com/example/medilightv2android/ble/BleManager.kt

@@ -378,18 +378,7 @@ class BleManager private constructor(private val context: Context) {
     }
 
     fun startBatteryPolling() {
-        batteryTimer?.let { handler.removeCallbacks(it) }
+        // 배터리 폴링 비활성화 — 기기에서 끊지 않음
-        sendBatteryQuery()
-        bluetoothGatt?.readRemoteRssi()
-        val poll = object : Runnable {
-            override fun run() {
-                sendBatteryQuery()
-                bluetoothGatt?.readRemoteRssi()
-                handler.postDelayed(this, 5000)
-            }
-        }
-        batteryTimer = poll
-        handler.postDelayed(poll, 5000)
     }
 
     fun stopBatteryPolling() {