Add pet action management and update requests

Repositories/PetRepository.cs

@@ -22,11 +22,33 @@ namespace pet_companion_api.Repositories
                 .ToList();
         }
 
+        public Pet GetPetById(string petId, string userId)
+        {
+            return _context.Pets
+                .FirstOrDefault(p => p.Id == petId && p.UserId == userId);
+        }
+
         public Pet CreatePet(Pet pet)
         {
             _context.Pets.Add(pet);
             _context.SaveChanges();
             return pet;
         }
+
+        public Pet UpdatePet(Pet pet)
+        {
+            _context.Pets.Update(pet);
+            _context.SaveChanges();
+            return pet;
+        }
+
+        public Pet UpdatePetAction(Pet pet)
+        {
+            _context.Pets.Attach(pet);
+            _context.Entry(pet).Property(p => p.PetAction).IsModified = true;
+            _context.Entry(pet).Property(p => p.ActionSince).IsModified = true;
+            _context.SaveChanges();
+            return pet;
+        }
     }
 }