add deleted attribute

lib/data/models/match.dart

@@ -16,6 +16,7 @@ class Match {
   final List<Player> players;
   final String notes;
   Map<String, ScoreEntry?> scores;
+  final bool deleted;
 
   Match({
     required this.name,
@@ -27,6 +28,7 @@ class Match {
     String? id,
     DateTime? createdAt,
     Map<String, ScoreEntry?>? scores,
+    this.deleted = false,
   }) : id = id ?? const Uuid().v4(),
        createdAt = createdAt ?? clock.now(),
        scores = scores ?? {for (Player p in players) p.id: null};
@@ -65,7 +67,8 @@ class Match {
               ),
             )
           : {},
-      notes = json['notes'] ?? '';
+      notes = json['notes'] ?? '',
+      deleted = json['deleted'] ?? false;
 
   /// Converts the Match instance to a JSON object. Related objects are
   /// represented by their IDs, so the game, group, and players are not fully
@@ -80,6 +83,7 @@ class Match {
     'playerIds': players.map((player) => player.id).toList(),
     'scores': scores.map((key, value) => MapEntry(key, value?.toJson())),
     'notes': notes,
+    'deleted': deleted,
   };
 
   List<Player> get mvp {