feat: BLE stability fixes, NIRS streaming improvements, catheter count feature

- Fix BLE API deprecation warnings with API 33+ version checks
- Move isServiceReady to onDescriptorWrite for reliable CCCD setup
- Fix battery polling: immediate query on connect, pause during NIRS streaming
- Add mcj retry mechanism for NIRS streaming reliability
- Add debug logging to BLE, NIRS parsing, and processing pipeline
- Add catheter count feature to Piezo monitoring (persistent count, add dialog, auto-decrement on catheterize)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/src/main/java/com/example/medilightv2android/managers/NirsManager.kt

@@ -42,6 +42,14 @@ class NirsManager private constructor() {
         currentOxy.value = result.oxyFiltered
         sampleCount.intValue++
 
+        if (sampleCount.intValue <= 3 || sampleCount.intValue % 50 == 0) {
+            android.util.Log.d("NirsManager", "Sample #${sampleCount.intValue}: " +
+                "hasGain=${calcEngine.hasGain}, " +
+                "led[0..5]=${packet.ledValues.take(6)}, " +
+                "degain[0..2]=${result.degain.take(3).map { "%.2f".format(it) }}, " +
+                "oxy=StO2:${"%.1f".format(result.oxyFiltered.stO2)} HbO2:${"%.1f".format(result.oxyFiltered.hbO2)} HHb:${"%.1f".format(result.oxyFiltered.hb)}")
+        }
+
         appendTrimming(oxyHbO2History, result.oxyFiltered.hbO2)
         appendTrimming(oxyHbHistory, result.oxyFiltered.hb)
     }