背包扩展到 5 页：服务端补丁 + DB 迁移 + 客户端 mt_inventory

- GameType.h: c_Inventory_Page_Count 2 -> 5; SQuickSlot.Position BYTE -> WORD
- quickslot 包/接口 pos 改为 WORD（CG/GC 5 字节），wire_classic 同步
- mt_inventory PORT 模块：inventorywindow.py 装备格 90 -> EQUIPMENT_SLOT_START 重映射、5 个小页签、
  自动药水高亮与 SelectItemWindow 扫描全部 5 页；40250 脚本保持不变
- tools/server/inventory-5-pages: server.patch（格子布局 +135、quickslot WORD）、migrate_db.py、README

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/platform/ScriptLib/PythonBoot.cpp

@@ -877,6 +877,7 @@ namespace PythonBoot
 #include "AutoHuntScript.inc"
 #include "RegisterScript.inc"
 #include "FrameRateOptionScript.inc"
+#include "InventoryPagesScript.inc"
 
 static void install_script_module(const char* c_szModule, const char* c_szScript)
 {
@@ -933,6 +934,7 @@ bool RunMainScript(const char* lpCmdLine, std::string* error)
 		install_script_module("mt_autohunt", c_szAutoHuntScript);
 		install_script_module("mt_register", c_szRegisterScript);
 		install_script_module("mt_framerate", c_szFrameRateOptionScript);
+		install_script_module("mt_inventory", c_szInventoryPagesScript);
 	}
 	return true;
 }