feat: add Atlas Cloud provider preset

[binyangzhu000-sudo]

Summary

• add Atlas Cloud to the built-in AI provider preset catalog
• configure its OpenAI-compatible Chat Completions endpoint and default model
• register the routed model semantics and keep credential injection defaults aligned

Verification

• pnpm exec vitest run src/ai-providers/preset-catalog.spec.ts src/ai-providers/model-semantics.spec.ts src/workspaces/cli/shim.spec.ts services/uta/src/domain/trading/brokers/presets.spec.ts (80 passed)
• pnpm exec tsc --noEmit
• full pnpm test: 3828 passed, 9 skipped; two unrelated tests timed out under the full parallel run and passed when rerun in the focused set; the catalog-contract failure found by the full run was fixed before the focused rerun
• parsed the preset and used its endpoint/model with the OpenAI client against the live Atlas Cloud API (123 models; default model present; chat completed)
• git diff --check

[vercel]

@binyangzhu000-sudo is attempting to deploy a commit to the luokerenx4's Team Team on Vercel.

A member of the Team first needs to authorize it.

[RainMona]

云端代理审阅（以 upstream dev @ 47e8651b 为准）

结论

仍可行动、值得接，但需重基 + CI 绿。

现状

• presetProviders 仍无 Atlas Cloud；产品需求仍成立。
• 与 dev 有冲突（含 PLANS.md）；需 rebase 到当前 dev。
• Checks：Vercel 授权噪声；项目 CI 未见到结果。

建议

1. Rebase 到 dev，解冲 PLANS.md（不要带无关的计划行）。
2. 确认仅触及 preset / 文档，不扩大到认证核心逻辑。
3. 项目 CI 绿后再合入。