Changeling cleanup and bugfix (#39843)

* fixes and cleanup

* key

Content.Shared/Changeling/Systems/ChangelingDevourSystem.cs

@@ -32,7 +32,7 @@ public sealed class ChangelingDevourSystem : EntitySystem
     [Dependency] private readonly EntityWhitelistSystem _whitelistSystem = default!;
     [Dependency] private readonly DamageableSystem _damageable = default!;
     [Dependency] private readonly MobStateSystem _mobState = default!;
-    [Dependency] private readonly ChangelingIdentitySystem _changelingIdentitySystem = default!;
+    [Dependency] private readonly SharedChangelingIdentitySystem _changelingIdentitySystem = default!;
     [Dependency] private readonly InventorySystem _inventorySystem = default!;
     [Dependency] private readonly SharedAudioSystem _audio = default!;
     [Dependency] private readonly ISharedAdminLogManager _adminLogger = default!;