feat(channel): add Requesty channel

[Thibaultjaigu]

关联 Issue / Related Issue

None.

变更内容 / Change Content

• 新功能 / New feature

Adds Requesty (https://router.requesty.ai/v1) as a built in channel preset next to OpenRouter. Requesty is an OpenAI compatible router in front of 700+ models addressed as vendor/model, for example openai/gpt-4o-mini, plus curated managed routing policies with short ids such as claude-sonnet-4-5.

Changes:

• New internal/channel/modules/requesty.go on the OpenAICompatible provider kind with EndpointFixedWithOverride (the same pattern as the SiliconFlow, Moonshot and Zhipu presets, since Bifrost ships no Requesty provider). CatalogProviderID: "requesty" maps to the models.dev requesty entry, whose ids are the managed policy ids, so the UI model picker merges those names and prices with the live /v1/models list. The EU, US and AP regional routers are listed as base URL hints and selectable through the Base URL override.
• Channel id in spec/definition.go, alias in channel.go, builtin registration after OpenRouter in builtins.go, icon web/src/assets/channels/requesty.webp (picked up by the existing import.meta.glob, no UI code change).
• Test expectations updated additively: registry order, embeddings support, SDK defaults, final provider contract and the route golden digest.
• README.md, README_CN.md, README_JP.md: Requesty added to the model services list and the embeddings sentence.

Not added to internal/catalog/price_priority.go or any other automatic preference order.

Validation:

• go build ./..., go vet ./..., gofmt -l clean on all touched files, git diff --check clean.
• go test -count=1 . ./internal/...: all packages pass except internal/webui TestReleaseWorkflowUsesTrustedCurrentRunChecksumForExistingRelease, which fails identically on a clean main (verifier rejected assets ... exit status 127).
• Live check through channel.NewRegistry().Resolve(channel.Requesty) and the Bifrost executor: GET /v1/models returns 200 with a valid key (778 models, openai/gpt-4o-mini present) and 403 with an invalid one, probe and chat completion against openai/gpt-4o-mini succeed with usage.cost populated, and embeddings via openai/text-embedding-3-small return 1536 dimensions.

自查清单 / Checklist

• 我已运行 make check，或在说明中写明无法运行的原因和未验证范围。 / I ran make check, or documented why it could not run and what remains unverified. (Go steps run individually as listed above. gofmt -l . on the whole tree flags internal/subscription/runtime/runtime_test.go, which is untouched here and already unformatted on main. Web lint, format and build were not run since this change adds no web source, only a static asset.)
• 本 PR 范围聚焦，未包含无关改动。 / This PR is focused and contains no unrelated changes.
• 我已更新必要的公开文档或发布说明。 / I updated any required public documentation or release notes.
• 我已确认提交、日志和测试数据不包含敏感信息。 / I confirmed that commits, logs, and fixtures contain no sensitive data.
• 如适用，我已说明兼容性或数据迁移影响。 / Where applicable, I documented compatibility or data-migration impact. (Additive only, no migration.)

Disclosure: I work at Requesty. Happy to adjust anything to match project conventions.

[coderabbitai]

📝 Walkthrough

Walkthrough

新增 Requesty 内置渠道。该渠道使用 API Key 和默认 Base URL，并提供 EU、US、AP 区域路由。原生路由支持 Chat Completion、Embeddings、Probe 和 List Models。Responses、Anthropic 和 Gemini 使用协议转换路由。相关注册表、契约测试、SDK 默认值测试和三种语言的 README 已更新。

Priority: ➖ Normal

Merge Risk: 🟠 High · up to 884d5

Documentation currently misstates supported Embeddings channels, and an untrusted Requesty base URL could receive the configured API key. Restrict the override to Requesty endpoints before merge.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 25.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 8 functions across 9 files. (3 skipped: 3…	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	标题准确概括了主要变更，即新增 Requesty channel。内容简洁、明确，并与 PR 变更一致。
Description check	✅ Passed	PR 描述基本完整。它说明了变更内容、验证结果、已知测试失败、文档更新、兼容性影响和自查结果。关联 Issue 标记为 None，但已明确说明没有关联 Issue。
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

Docstring coverage is 25.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 8 functions across 9 files. (3 skipped: 3 unsupported.)

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[coderabbitai]

Actionable comments posted: 1

Note

Quiet mode is enabled, so only the most important comments were posted inline. Other review comments are grouped below.

🟡 Other comments (1)

README.md-146-146 (1)

146-146: 🎯 Functional Correctness | 🟡 Minor | ⚡ Quick win

同步三份 README 的原生 Embeddings 支持渠道列表。 GPTLoad 和 NewAPI 也在 internal/channel/embeddings_module_test.go:10-39 中定义为支持原生 Embeddings 的渠道。请在以下位置补充这两个渠道：

• README.md#L146-L146：在英文列表中加入 GPTLoad 和 NewAPI。
• README_CN.md#L146-L146：在中文列表中加入 GPTLoad 和 NewAPI。
• README_JP.md#L146-L146：在日文列表中加入 GPTLoad 和 NewAPI。

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: QUIET

Plan: Advanced

Run ID: 1e34b9b8-53d2-437c-a769-3a6e2509feb2

📥 Commits

Reviewing files that changed from the base of the PR and between 33ec668 and cf808b8.

📒 Files selected for processing (13)

• README.md
• README_CN.md
• README_JP.md
• internal/channel/builtins.go
• internal/channel/channel.go
• internal/channel/embeddings_module_test.go
• internal/channel/final_provider_contract_test.go
• internal/channel/modules/requesty.go
• internal/channel/registry_test.go
• internal/channel/route_golden_test.go
• internal/channel/spec/definition.go
• internal/execution/bifrost/sdk_defaults_test.go
• web/src/assets/channels/requesty.webp

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