fix(office): 清理 /locate 残留文档，收窄 office 工具输出 schema

- 打包、document 分组、office-kit 子系统页与 Agent Note 改为提供方内部解析 Kit，不再引用已删除的 /locate 入口
- office_recalculate 输出 format 收窄为 xlsx/ods；office_render 图片 mediaType 去掉 GIF，存储返回 GIF 时明确报错
- 修正 office-kit 输出位置、技能数量、token 预算说明，补充 /office 直接调用的激活时机限制
- 升级指南说明继承的 DSH_PRIMARY_RUNTIME 优先于 SDK 下载缓存，刷新 office-progressive-ptc 系统提示快照

python/sdk-runtime/runtime-bootstrap.mjs

@@ -89,7 +89,8 @@ if (resource !== undefined) {
   Reflect.deleteProperty(process.env, 'DSH_PTC_RUNTIME_NODE')
   await import('@deepseek-ai/dsh-ptc-runtime-node/process')
 } else if (selection === undefined) {
-  // A user-set DSH_PRIMARY_RUNTIME, including the empty opt-out, takes precedence over the downloaded cache.
+  // A DSH_PRIMARY_RUNTIME set or inherited from the environment, including the empty opt-out, takes precedence over the
+  // downloaded cache.
   if (cache !== undefined && existsSync(join(cache, 'primary', 'complete'))) {
     process.env.DSH_PRIMARY_RUNTIME ??= join(cache, 'primary', 'primary-runtime')
   }