feat(watch): renforce la vibration de fin de chrono et consolide la remontee des donnees stats montre

Cote montre pour #180 (vibration timerFinished plus longue et plus forte) et #179 (contrat/collecte des donnees stats vers le telephone).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

test/infrastructure/watch_bridge/wear_data_layer_adapter_test.dart

@@ -672,6 +672,21 @@ final class _FakeWorkoutTelemetryRepository
         .toList(growable: false);
   }
 
+  @override
+  Future<List<WorkoutTelemetrySample>> listSamplesForScope({
+    required String sessionId,
+    required WorkoutTelemetryAggregateScope scope,
+    int? programIndex,
+    int? exerciseIndex,
+    int? setIndex,
+    int? passageIndex,
+    int? stepIndex,
+  }) async {
+    return samples
+        .where((sample) => sample.sessionId == sessionId)
+        .toList(growable: false);
+  }
+
   @override
   Future<void> replaceAggregatesForSession({
     required String sessionId,