fix(audio): make the audio diagnostics visible in release builds

Every diagnostic line in the audio path used `dart:developer`'s `log()`.
That function writes to the VM service, which a RELEASE build does not
have — so in the only build that ever runs in a car, all eleven of them
went nowhere. `debugPrint`/`print` do reach logcat in release; `log()`
does not.

That includes the two channels built specifically to end the guessing:
- `registrarErrorAudioService`, which subscribes to
  `AudioService.asyncError` so the plugin's swallowed platform exceptions
  stop vanishing (b0271fa). It moved them from a dropped PublishSubject
  to a dropped log call.
- `_trazarEstadoPublicado`, the published-state trace added in 7054a4c to
  settle why the car's play button never becomes pause.

So "no evidence" was never a quiet app. It was an app writing its
evidence somewhere release builds discard. Several rounds of hypotheses
were argued without data that the app was already producing.

All eleven now use `debugPrint` with a `[PluriWave][Tag]` prefix, so one
filter catches the audio path and the existing alarm lines together:

  adb logcat | grep PluriWave

No behaviour changes. Tests: 1158, unchanged.

lib/servicios/servicio_ecualizador.dart

@@ -70,7 +70,10 @@ class ServicioEcualizador {
     final porEmisora = _leerPresetsPorEmisora(prefs);
     final presetsDispositivo = _leerMapa(prefs, _keyPresetsPorDispositivo);
     final presetsMatriz = _leerMapa(prefs, _keyPresetsMatriz);
-    final nombresDispositivos = _leerMapaStrings(prefs, _keyNombresDispositivos);
+    final nombresDispositivos = _leerMapaStrings(
+      prefs,
+      _keyNombresDispositivos,
+    );
     return ConfiguracionEcualizador(
       principal: principal,
       porEmisora: porEmisora,
@@ -124,21 +127,22 @@ class ServicioEcualizador {
     String prefijo,
   ) async {
     final presetsPorDispositivo = _leerMapa(prefs, _keyPresetsPorDispositivo);
-    final dispositivos = presetsPorDispositivo.keys
-        .where((clave) => clave.startsWith(prefijo))
-        .toList();
+    final dispositivos =
+        presetsPorDispositivo.keys
+            .where((clave) => clave.startsWith(prefijo))
+            .toList();
 
     final nombres = _leerMapaStrings(prefs, _keyNombresDispositivos);
-    final nombresAPurgar = nombres.keys
-        .where((clave) => clave.startsWith(prefijo))
-        .toList();
+    final nombresAPurgar =
+        nombres.keys.where((clave) => clave.startsWith(prefijo)).toList();
 
     final matriz = _leerMapa(prefs, _keyPresetsMatriz);
-    final matrizAPurgar = matriz.keys.where((clave) {
-      final separador = clave.indexOf(':');
-      if (separador == -1) return false;
-      return clave.substring(separador + 1).startsWith(prefijo);
-    }).toList();
+    final matrizAPurgar =
+        matriz.keys.where((clave) {
+          final separador = clave.indexOf(':');
+          if (separador == -1) return false;
+          return clave.substring(separador + 1).startsWith(prefijo);
+        }).toList();
 
     for (final clave in dispositivos) {
       presetsPorDispositivo.remove(clave);
@@ -183,11 +187,12 @@ class ServicioEcualizador {
     // (station UUIDs are RFC4122 and contain no colons — multi-device-eq
     // ADR-3), since deviceId itself may contain colons (e.g. a MAC-based id).
     final presetsMatriz = _leerMapa(prefs, _keyPresetsMatriz);
-    final clavesMatrizAPurgar = presetsMatriz.keys.where((clave) {
-      final separador = clave.indexOf(':');
-      if (separador == -1) return false;
-      return clave.substring(separador + 1) == deviceId;
-    }).toList();
+    final clavesMatrizAPurgar =
+        presetsMatriz.keys.where((clave) {
+          final separador = clave.indexOf(':');
+          if (separador == -1) return false;
+          return clave.substring(separador + 1) == deviceId;
+        }).toList();
     if (clavesMatrizAPurgar.isNotEmpty) {
       for (final clave in clavesMatrizAPurgar) {
         presetsMatriz.remove(clave);