Fix luminance: hook ServerDispatch in Startup and handle 0x02CF updates

- Move Init() and ServerDispatch hook from LoginComplete to Startup so
  event 0x0013 (character properties) is caught during login sequence
- Add handler for message 0x02CF (PrivateUpdatePropertyInt64) to capture
  runtime luminance changes when player earns/spends luminance in-game
- Uses RawData byte parsing for 0x02CF since Decal messages.xml may not
  define this message type

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

MosswartMassacre/CharacterStats.cs

@@ -146,6 +146,33 @@ namespace MosswartMassacre
             }
         }
 
+        /// <summary>
+        /// Process message 0x02CF - PrivateUpdatePropertyInt64.
+        /// Sent during gameplay when an Int64 property changes (e.g., luminance earned/spent).
+        /// Wire format after 4-byte type header: sequence(1) + key(4) + value(8).
+        /// Uses RawData since Decal's messages.xml may not define this message type.
+        /// </summary>
+        internal static void ProcessPropertyInt64Update(NetworkMessageEventArgs e)
+        {
+            try
+            {
+                byte[] raw = e.Message.RawData;
+                if (raw.Length < 17) return; // 4 type + 1 seq + 4 key + 8 value
+
+                int key = BitConverter.ToInt32(raw, 5);
+                long value = BitConverter.ToInt64(raw, 9);
+
+                if (key == 6) // AvailableLuminance
+                    luminanceEarned = value;
+                else if (key == 7) // MaximumLuminance
+                    luminanceTotal = value;
+            }
+            catch (Exception ex)
+            {
+                PluginCore.WriteToChat($"[CharStats] Int64 property update error: {ex.Message}");
+            }
+        }
+
         /// <summary>
         /// Process game event 0x0029 - Titles list.
         /// Extracts current title ID.