Add action gathering functionality: implement ActionGathered model and repository, update Pet model and services, and enhance GameItemsRepository with item retrieval methods.

Data/ApplicationDbContext.cs

@@ -18,6 +18,7 @@ namespace PetCompanion.Data
         public DbSet<GameItem> GameItems { get; set; }
         public DbSet<Inventory> Inventories { get; set; }
         public DbSet<EquippedItem> EquippedItems { get; set; }
+        public DbSet<ActionGathered> ActionGathered { get; set; }
 
         protected override void OnModelCreating(ModelBuilder modelBuilder)
         {
@@ -66,6 +67,17 @@ namespace PetCompanion.Data
                 .WithMany()
                 .HasForeignKey(e => e.GameItemId);
 
+            modelBuilder.Entity<ActionGathered>()
+                .HasOne(ag => ag.Pet)
+                .WithMany(p => p.ActionGathered)
+                .HasForeignKey(ag => ag.PetId)
+                .OnDelete(DeleteBehavior.Cascade);
+
+            modelBuilder.Entity<ActionGathered>()
+                .HasOne(ag => ag.GameItem)
+                .WithMany()
+                .HasForeignKey(ag => ag.ItemId);
+
             // Seed initial data
             var skills = SkillsData.GetInitialSkillsWithoutRelations();
             var requirements = SkillsData.GetInitialSkillRequirements();