Fix Reset All Data crash by using safe cascade deletion

MealMood/Services/DefaultDataService.swift

@@ -3,7 +3,7 @@ import SwiftData
 
 struct DefaultDataService {
 
-    static func createDefaultTags(context: ModelContext) {
+    static func createDefaultTags(context: ModelContext, saveImmediately: Bool = true) {
         let defaults: [(name: String, nameEN: String, color: String, maxPerWeek: Int?, noConsecutive: Bool, noDuplicateInDay: Bool, mealTypeRestriction: String?, sortOrder: Int)] = [
             ("Carne", "Meat", "#E74C3C", 3, true, true, nil, 0),
             ("Pescado", "Fish", "#3498DB", 2, true, true, nil, 1),
@@ -32,7 +32,9 @@ struct DefaultDataService {
             context.insert(tag)
         }
 
-        try? context.save()
+        if saveImmediately {
+            try? context.save()
+        }
     }
 
     static func createDefaultSettings(context: ModelContext) {