feat: 适配 Lua 5.5.1 最新版 (lua_5.5.1 分支)

- lib/lua 替换为 Lua 5.5.1 官方源码(2026-07 发布, 当前最新)
- luaconf.h LUA_EXTRASPACE 扩为 272 字节(与 5.4.8 同方案)
- C API 完全兼容, 桥接层零改动
- PackagePathConfig 测试沿用跨版本语义断言(5.4+ require 返回 loader data 路径)
- 验证: GTest 44/44 通过

lib/lua/lfunc.h

@@ -11,11 +11,11 @@
 #include "lobject.h"
 
 
-#define sizeCclosure(n)	(cast_int(offsetof(CClosure, upvalue)) + \
-                         cast_int(sizeof(TValue)) * (n))
+#define sizeCclosure(n)  \
+	(offsetof(CClosure, upvalue) + sizeof(TValue) * cast_uint(n))
 
-#define sizeLclosure(n)	(cast_int(offsetof(LClosure, upvals)) + \
-                         cast_int(sizeof(TValue *)) * (n))
+#define sizeLclosure(n)  \
+	(offsetof(LClosure, upvals) + sizeof(UpVal *) * cast_uint(n))
 
 
 /* test whether thread is in 'twups' list */
@@ -44,7 +44,7 @@
 
 
 /* special status to close upvalues preserving the top of the stack */
-#define CLOSEKTOP	(-1)
+#define CLOSEKTOP	(LUA_ERRERR + 1)
 
 
 LUAI_FUNC Proto *luaF_newproto (lua_State *L);
@@ -54,8 +54,9 @@ LUAI_FUNC void luaF_initupvals (lua_State *L, LClosure *cl);
 LUAI_FUNC UpVal *luaF_findupval (lua_State *L, StkId level);
 LUAI_FUNC void luaF_newtbcupval (lua_State *L, StkId level);
 LUAI_FUNC void luaF_closeupval (lua_State *L, StkId level);
-LUAI_FUNC StkId luaF_close (lua_State *L, StkId level, int status, int yy);
+LUAI_FUNC StkId luaF_close (lua_State *L, StkId level, TStatus status, int yy);
 LUAI_FUNC void luaF_unlinkupval (UpVal *uv);
+LUAI_FUNC lu_mem luaF_protosize (Proto *p);
 LUAI_FUNC void luaF_freeproto (lua_State *L, Proto *f);
 LUAI_FUNC const char *luaF_getlocalname (const Proto *func, int local_number,
                                          int pc);