docs(rerank): document DashScope provider

[ACBBZ]

Summary

• Document dashscope as a supported [rerank].provider alongside deepinfra and vllm.
• Clarify in build_rerank_provider that api_key is required for both DeepInfra and DashScope, while it remains optional for self-hosted vLLM endpoints.
• No runtime behavior changes.

Area

• Architecture method
• Benchmark
• Use case
• Documentation
• Developer experience
• CI, build, or release

Verification

Python AST parse of the updated factory.py: passed
Configuration table structure/provider-name check: passed
Branch diff: 1 commit, 2 files; documentation/docstring changes only

Repo-wide make ci was not run because the execution environment could not create a working-tree checkout. The change does not alter runtime behavior.

Checklist

• I kept the change scoped to the relevant area.
• I am opening this from a separate branch, not pushing directly to main.
• I updated docs, examples, or setup notes when behavior changed.
• Tests are not applicable because this change does not affect behavior.
• I did not commit secrets, .env files, dependency folders, or generated output.
• No Markdown links were added or changed.

Notes for Reviewers

RerankSettings and the provider factory already support DashScope; this PR only brings the configuration reference and the factory docstring in sync with the existing implementation.

By submitting this pull request, I agree that my contribution is licensed under
the Apache License 2.0.

[Copilot]

🟡 Changes recommended

The [rerank] configuration table still marks api_key as universally required even though it is optional for self-hosted vllm endpoints, leaving the docs inconsistent with the implementation.

Once you've addressed the issues Copilot identified, you can request another Copilot review.

Pull request overview

Updates EverOS’s configuration reference/docs to include the existing DashScope rerank provider and clarifies API-key expectations in the rerank provider factory documentation so the docs match current behavior.

Changes:

• Document dashscope as a supported [rerank].provider alongside deepinfra and vllm.
• Clarify (docstring) that api_key is required for deepinfra and dashscope, but optional for self-hosted vllm endpoints.

File summaries

File	Description
src/everos/component/rerank/factory.py	Updates the build_rerank_provider docstring to reflect DashScope support and api_key requirements by provider.
docs/configuration.md	Expands the [rerank] provider field documentation to include dashscope.

Review details

• Files reviewed: 2/2 changed files
• Comments generated: 1
• Review effort level: Lite

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