chore(debug): 移除 [DBG-GEN] 一次性插桩（改走静态分析）

按用户要求撤掉 lookup_field 里的临时打印，恢复原函数体。

App/lib/core/Gen/StructGenMixin.vp

@@ -1304,26 +1304,6 @@ novirtual class StructGenMixin:
         if struct_ty is None or field_name is None or self.StructTable is None:
             return None
 
-        # [DBG-GEN] 一次性诊断（定位 Generator.FuncGenBase 字段查找失败，用完删除）
-        if string.strcmp(field_name, "FuncGenBase") == 0:
-            _dg_ty: str = self._extract_struct_name(struct_ty)
-            _dg_ty_t: str = "<non-struct>"
-            if _dg_ty is not None:
-                _dg_ty_t = _dg_ty
-            stdio.printf("[DBG-GEN] lookup 'FuncGenBase' struct_ty=%s\n", _dg_ty_t)
-            _dg_i: int = 0
-            while _dg_i < self.StructCount:
-                _dg_e: GenTypes.StructEntry* = self._get_struct_entry(_dg_i)
-                if _dg_e is not None and _dg_e.Name is not None:
-                    if string.strstr(_dg_e.Name, "Generator") is not None:
-                        _dg_sh: str = _dg_e.ModuleSha1
-                        _dg_sh_t: str = "<null>"
-                        if _dg_sh is not None:
-                            _dg_sh_t = _dg_sh
-                        stdio.printf("[DBG-GEN] tbl[%d] name=%s fcount=%d sha1=%s\n",
-                                     _dg_i, _dg_e.Name, _dg_e.FieldCount, _dg_sh_t)
-                _dg_i += 1
-
         # ============================================================
         # 两遍查找策略（跨模块同名类冲突的根本修复）:
         #