feat: allow configuration of authPolicy for swagger page

[sjorobekov]

No description provided.

[Copilot]

Pull request overview

Adds an authPolicy option to the OpenAPI registry configuration so consumers can control authentication behavior for the Swagger UI mount route.

Changes:

• Extended OpenApiRegistryConfig with an optional authPolicy.
• Applied the configured authPolicy when registering the Swagger UI MOUNT route.
• Added tests and README documentation for the new configuration option.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
src/types.ts	Adds authPolicy?: AuthPolicy to the registry config type.
src/openapi-registry.ts	Uses configured/default auth policy when creating the docs mount route (and currently also adds it to the schema object).
src/tests/openapi-registry.test.ts	Adds coverage for default vs configured auth policy on the MOUNT /api/docs route.
README.md	Documents the new authPolicy config field and its default.

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