docs: switch scheduler quick-start samples to HTTP requests

[Lilili-04]

Update CN/EN scheduler wait and get_status docs to use direct HTTP API examples instead of SDK snippets, including blocking and SSE usage patterns.

Description

Update CN/EN scheduler wait and get_status docs to use direct HTTP API examples instead of SDK snippets.
Include both blocking wait and SSE streaming usage patterns.

Related Issue (Required): Fixes #2083

Type of change

• Documentation update

How Has This Been Tested?

N/A (documentation-only change)

Checklist

• I have performed a self-review of my own code | 我已自行检查了自己的代码
• I have commented my code in hard-to-understand areas | 我已在难以理解的地方对代码进行了注释
• I have added tests that prove my fix is effective or that my feature works | 我已添加测试以证明我的修复有效或功能正常
• I have created related documentation issue/PR in MemOS-Docs (if applicable) | 我已在 MemOS-Docs 中创建了相关的文档 issue/PR（如果适用）
• I have linked the issue to this PR (if applicable) | 我已将 issue 链接到此 PR（如果适用）
• I have mentioned the person who will review this PR | 我已提及将审查此 PR 的人

Reviewer Checklist

• closes #xxxx (Replace xxxx with the GitHub issue number)
• Made sure Checks passed
• Tests have been provided