调整部分数据表配置，优化 SpriteCache 功能

Assets/GameMain/Scripts/Runtime/CustomComponent/EnemyManager/EnemyRegistry.cs

@@ -6,6 +6,8 @@ namespace SepCore.EnemyManager
     public class EnemyRegistry
     {
         private readonly Dictionary<int, EntityBase> _enemyById;
+        // PruneInvalidEntries 由 OnUpdate 每帧调用，复用缓冲避免每帧分配。
+        private readonly List<int> _pruneBuffer;
 
         public int Count => _enemyById.Count;
         public IReadOnlyCollection<EntityBase> Enemies => _enemyById.Values;
@@ -13,11 +15,11 @@ namespace SepCore.EnemyManager
         public EnemyRegistry()
         {
             _enemyById = new Dictionary<int, EntityBase>();
+            _pruneBuffer = new List<int>();
         }
 
         public void Register(EnemyBase enemy)
         {
-            if (enemy == null) return;
             _enemyById[enemy.Id] = enemy;
         }
 
@@ -35,16 +37,16 @@ namespace SepCore.EnemyManager
 
         public void PruneInvalidEntries()
         {
-            var invalidIds = new List<int>();
+            _pruneBuffer.Clear();
             foreach (var kvp in _enemyById)
             {
                 if (kvp.Value == null || !kvp.Value.Available)
                 {
-                    invalidIds.Add(kvp.Key);
+                    _pruneBuffer.Add(kvp.Key);
                 }
             }
 
-            foreach (int id in invalidIds)
+            foreach (int id in _pruneBuffer)
             {
                 _enemyById.Remove(id);
             }