feat(core): consolide le chainage type metier d'exercice -> strategie Health Services -> payload montre -> consommation Kotlin

Finalise #183 : modele/persistance des types metier d'exercice, mapping vers la strategie Health Services, propagation du payload dans le contrat watch bridge et consommation cote Kotlin montre. Perimetre complet QA vert.

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

test/application/watch_companion_projection_test.dart

@@ -54,6 +54,29 @@ void main() {
     expect(projection.dominantTimer, isNull);
   });
 
+  test(
+    'projects Health Services exercise type strategy from snapshot',
+    () async {
+      final repository = _FakeActiveSessionRepository()
+        ..session = _session(
+          healthServicesExerciseTypeStrategy: const [
+            'RUNNING',
+            'HIGH_INTENSITY_INTERVAL_TRAINING',
+            'WORKOUT',
+          ],
+        );
+      final projector = _projector(repository, _clock());
+
+      final projection = await projector.project(revision: 1);
+
+      expect(projection.healthServicesExerciseTypeStrategy, [
+        'RUNNING',
+        'HIGH_INTENSITY_INTERVAL_TRAINING',
+        'WORKOUT',
+      ]);
+    },
+  );
+
   test('projects running with step timer before stopwatch score', () async {
     final now = DateTime.utc(2026, 7, 25, 12);
     final session = _session(
@@ -587,6 +610,7 @@ ActiveWorkoutSession _session({
   bool? autoStartNextTimedStepSnapshot = true,
   List<ExerciseStep> steps = const [],
   String? secondExerciseName,
+  List<String> healthServicesExerciseTypeStrategy = const [],
 }) {
   final exerciseSnapshot = {
     'id': 'exercise-snapshot-1',
@@ -603,6 +627,7 @@ ActiveWorkoutSession _session({
         .map((step) => step.toSnapshotJson())
         .toList(),
     'autoStartNextTimedStepSnapshot': ?autoStartNextTimedStepSnapshot,
+    'healthServicesExerciseTypeStrategy': healthServicesExerciseTypeStrategy,
   };
   final secondExerciseSnapshot = secondExerciseName == null
       ? null