feat(server): implemente synchronisation et serveur avec fixtures (#187)

- Implémente la couche de synchronisation avec le serveur
- Ajoute les fixtures versionnées pour les tests
- Met à jour Drift database et repositories pour le support sync
- Améliore les tests de synchronisation
- Corrige et améliore le watch companion pour la collecte de métriques

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

lib/application/starter_content/starter_content.dart

@@ -1,14 +1,15 @@
 import '../../domain/domain.dart';
 import '../ports.dart';
 
-const int starterSeedVersion = 1;
+const int starterSeedVersion = 2;
 
 final class StarterExerciseSeed {
   const StarterExerciseSeed({
     required this.id,
     required this.name,
     required this.description,
-    required this.category,
+    this.category = ExerciseCategory.uncategorized,
+    this.businessTypes = const [],
     this.hasTimeMeasure = false,
     this.hasRepsMeasure = false,
     this.hasScoreMeasure = false,
@@ -19,6 +20,7 @@ final class StarterExerciseSeed {
     this.defaultTargetReps,
     this.defaultTargetScore,
     this.defaultTargetScoreTimeMs,
+    this.tags = const [],
     this.steps = const [],
   });
 
@@ -26,6 +28,7 @@ final class StarterExerciseSeed {
   final String name;
   final String description;
   final ExerciseCategory category;
+  final List<BusinessExerciseType> businessTypes;
   final bool hasTimeMeasure;
   final bool hasRepsMeasure;
   final bool hasScoreMeasure;
@@ -36,6 +39,7 @@ final class StarterExerciseSeed {
   final int? defaultTargetReps;
   final double? defaultTargetScore;
   final int? defaultTargetScoreTimeMs;
+  final List<String> tags;
   final List<StarterExerciseStepSeed> steps;
 }
 
@@ -59,12 +63,14 @@ final class StarterProgramSeed {
     required this.name,
     required this.defaultRestSeconds,
     required this.exercises,
+    this.tags = const [],
   });
 
   final String id;
   final String name;
   final int defaultRestSeconds;
   final List<StarterProgramExerciseSeed> exercises;
+  final List<String> tags;
 }
 
 final class StarterProgramExerciseSeed {
@@ -96,11 +102,13 @@ final class StarterWorkoutTemplateSeed {
     required this.id,
     required this.name,
     required this.programSnapshotId,
+    this.tags = const [],
   });
 
   final String id;
   final String name;
   final String programSnapshotId;
+  final List<String> tags;
 }
 
 StarterContent buildStarterContent({
@@ -127,7 +135,9 @@ StarterContent buildStarterContent({
       defaultTargetScore: seed.defaultTargetScore,
       defaultTargetScoreTimeMs: seed.defaultTargetScoreTimeMs,
       category: seed.category,
+      businessTypes: seed.businessTypes,
       isExample: true,
+      tags: seed.tags,
       steps: [
         for (var index = 0; index < seed.steps.length; index += 1)
           ExerciseStep(
@@ -170,6 +180,7 @@ StarterContent buildStarterContent({
     name: programSeed.name,
     defaultRestSeconds: programSeed.defaultRestSeconds,
     isExample: true,
+    tags: programSeed.tags,
     exercises: programExercises,
   );
   final templateProgram = WorkoutTemplateProgram.snapshotFromProgram(
@@ -182,6 +193,7 @@ StarterContent buildStarterContent({
     metadata: _metadata(templateSeed.id, now, originDeviceId),
     name: templateSeed.name,
     isExample: true,
+    tags: templateSeed.tags,
     programs: [templateProgram],
   );