cleanup: WATCHDOG_CHECK 디버그 로그 제거 (이벤트성 로그만 유지)

WATCHDOG_STARTED/TIMEOUT/GATT_ERROR/RECONNECT 등 이벤트 로그는 유지.
5초마다 찍히던 WATCHDOG_CHECK/THREAD 상태 로그 제거.

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

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

@@ -364,27 +364,12 @@ class BleManager private constructor(private val context: Context) {
         debugLogger.info("WATCHDOG_STARTED timeout=${watchdogTimeoutMs}ms")
 
         watchdogJob = Thread({
-            debugLogger.info("WATCHDOG_THREAD running")
             while (watchdogRunning) {
-                try { Thread.sleep(5000) } catch (e: InterruptedException) {
+                try { Thread.sleep(5000) } catch (_: InterruptedException) { break }
-                    debugLogger.warn("WATCHDOG_THREAD interrupted")
+                if (!watchdogRunning) break
-                    break
+                if (!isConnected.value) break
-                }
-                if (!watchdogRunning) {
-                    debugLogger.info("WATCHDOG_THREAD stopped (flag)")
-                    break
-                }
 
                 val silenceMs = System.currentTimeMillis() - lastRxTimestamp
-                val connected = isConnected.value
-                debugLogger.info("WATCHDOG_CHECK silence=${silenceMs}ms connected=$connected")
-
-                // connected=false면 정상 경로에서 이미 처리됨 → watchdog 종료
-                if (!connected) {
-                    debugLogger.info("WATCHDOG_STOP — already disconnected (handled by GATT callback)")
-                    break
-                }
-
                 if (silenceMs > watchdogTimeoutMs) {
                     // 직접 로그 기록 (handler 블로킹 무관)
                     debugLogger.error("WATCHDOG_TIMEOUT silence=${silenceMs}ms — forcing reconnect")