横屏改为 auto_rotation_landscape：横屏两朝向跟随传感器旋转，不进竖屏

- module.json5：landscape → auto_rotation_landscape（横屏正/反向 180° 跟随重力
  感应自动旋转，但不进入竖屏），build 校验取值合法、安装启动通过
- 同步契约 §7 与框架 §7.4：'不跟随传感器' 修正为 '横屏两朝向内跟随旋转'
- H5 显式方向控制（含竖屏）仍由 setPreferredOrientation 保留，零改动不变

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

entry/src/main/module.json5

@@ -14,7 +14,7 @@
       {
         "name": "EntryAbility",
         "srcEntry": "./ets/entryability/EntryAbility.ets",
-        "orientation": "landscape",
+        "orientation": "auto_rotation_landscape",
         "description": "$string:EntryAbility_desc",
         "icon": "$media:layered_image",
         "label": "$string:EntryAbility_label",