fix: Swagger not working when static files weren't served at /static/

[m4tx]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 95.00000% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
cot/src/openapi/swagger_ui.rs	95.00%	0 Missing and 1 partial ⚠️

Flag	Coverage Δ
rust	89.74% <95.00%> (+<0.01%)	⬆️

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Files with missing lines	Coverage Δ
cot/src/openapi/swagger_ui.rs	80.95% <95.00%> (+4.02%)	⬆️

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[seqre]

Why did you have to include OnceLock?

[m4tx]

Why did you have to include OnceLock?

We don't know the URLs of the static files until the first request. We need to set them in the SwaggerUi object (to a &mut reference), so we need either a OnceLock, a Mutex, or some other mechanism that allows us to mutate the object after it was created.