fix: Adds AfterSerialize support. Removes BeforeSerialize support. (#1208)

### Changes
* Implements an AfterSerialize method that is executed synchronously.
* Removes `BeforeSerialize` support since it was dangerous in its current implementation.
* Moves PlayerMobile kill/virtual decay to AfterSerialize.
* Adds kill decay to after Deserialize.

Projects/Server/Serialization/Persistence.cs

@@ -32,6 +32,7 @@ public static class Persistence
         Action serializer,
         Action<string> snapshotWriter,
         Action<string, Dictionary<ulong, string>> deserializer,
+        Action afterSerialize = null,
         int priority = DefaultPriority
     )
     {
@@ -41,6 +42,7 @@ public static class Persistence
                 Name = name,
                 Priority = priority,
                 Serialize = serializer,
+                AfterSerialize = afterSerialize,
                 WriteSnapshot = snapshotWriter,
                 Deserialize = deserializer
             }
@@ -89,6 +91,12 @@ public static class Persistence
     public static void Serialize()
     {
         Parallel.ForEach(_registry, entry => entry.Serialize());
+
+        // Synchronously run the AfterSerialize on the main game thread
+        foreach (var entry in _registry)
+        {
+            entry.AfterSerialize?.Invoke();
+        }
     }
 
     public static void WriteSnapshot(string path, ConcurrentQueue<Type> types)
@@ -130,7 +138,10 @@ public static class Persistence
     {
         public string Name { get; init; }
         public int Priority { get; init; }
-        public Action Serialize { get; init; } // Serializing to memory buffers
+
+        // Serializes to memory buffers and run in parallel
+        public Action Serialize { get; init; }
+        public Action AfterSerialize { get; init; }
         public Action<string> WriteSnapshot { get; init; }
         public Action<string, Dictionary<ulong, string>> Deserialize { get; init; }
     }