fix(narrow): len() 结果赋给 int 的形参/默认值计数改用显式 int(...)

FuncGenDef 的 fd_param_count/fd_default_count/tfd_param_count/tfd_default_count 与 ClassGenVTable 的 md_param_count/md_default_count 原本直接接收 len()（sizet），触发隐式窄化；改 int(len(...)) 保持原有截断语义

App/lib/core/Gen/Class/ClassGenVTable.vp

@@ -536,12 +536,12 @@ novirtual class ClassGenVTable(ClassGenBase.ClassGenBase):
                 md_ags: ast.Arguments* = ast.Arguments*(md_args_node)
                 if md_ags.args is not None:
                     md_alist: list[ast.AST*]* = md_ags.args
-                    if is_static_m != 0: md_param_count = len(md_alist)
-                    else: md_param_count = len(md_alist) - 1
+                    if is_static_m != 0: md_param_count = int(len(md_alist))
+                    else: md_param_count = int(len(md_alist)) - 1
                 if md_ags.defaults is not None:
                     md_dlist: list[ast.AST*]* = md_ags.defaults
                     md_defaults = md_dlist
-                    md_default_count = len(md_dlist)
+                    md_default_count = int(len(md_dlist))
 
             # Register in the function table (lookup name ClassName.method_name, suffix matching).
             max_funcs: int = 1024

App/lib/core/Gen/Func/FuncGenDef.vp

@@ -180,11 +180,11 @@ novirtual class FuncGenDef(CallGenBase.CallGenBase):
                 fd_ags: ast.Arguments* = ast.Arguments*(fd_args_node)
                 if fd_ags.args is not None:
                     fd_alist: list[ast.AST*]* = fd_ags.args
-                    fd_param_count = len(fd_alist)
+                    fd_param_count = int(len(fd_alist))
                 if fd_ags.defaults is not None:
                     fd_dlist: list[ast.AST*]* = fd_ags.defaults
                     fd_defaults = fd_dlist
-                    fd_default_count = len(fd_dlist)
+                    fd_default_count = int(len(fd_dlist))
 
             # Register in the function table (using bare fd.name, not mangled_name)
             max_funcs: int = 1024
@@ -490,11 +490,11 @@ novirtual class FuncGenDef(CallGenBase.CallGenBase):
                 tfd_ags: ast.Arguments* = ast.Arguments*(args_node)
                 if tfd_ags.args is not None:
                     tfd_alist: list[ast.AST*]* = tfd_ags.args
-                    tfd_param_count = len(tfd_alist)
+                    tfd_param_count = int(len(tfd_alist))
                 if tfd_ags.defaults is not None:
                     tfd_dlist: list[ast.AST*]* = tfd_ags.defaults
                     tfd_defaults = tfd_dlist
-                    tfd_default_count = len(tfd_dlist)
+                    tfd_default_count = int(len(tfd_dlist))
 
             # Register in the function table
             max_funcs: int = 1024