fix(qwen): patch regional dashscope endpoints + inline validator

Qwen patcher had two issues:
1. Only patched dashscope.aliyuncs.com but missed regional endpoints
   (cn-hongkong, dashscope-intl, dashscope-us). Users in those regions
   would still hit Aliyun directly.
2. --validate raised ModuleNotFoundError (referenced removed updater/
   package). Replaced with self-contained inline checker — 13 GREEN
   targets covering cli.js markers, settings.json, env vars.

Also bump Codex version to v0.122.0 across all READMEs (was v0.116.0).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

README.md

@@ -9,7 +9,7 @@ Patched AI coding tools for use with custom API endpoints.
 | Folder | Tool | Status |
 |--------|------|--------|
 | [claude/](claude/) | Claude Code | Active (v2.1.112) |
-| [codex/](codex/) | OpenAI Codex CLI | **Active (v0.116.0)** |
+| [codex/](codex/) | OpenAI Codex CLI | **Active (v0.122.0)** |
 | [gemini/](gemini/) | Gemini CLI | **Active (v0.35.3)** |
 | [qwen/](qwen/) | Qwen Code | **Active (v0.14.5)** |
 | antigravity/ | Antigravity | Planned |