docs: document applyQueryDefaultsOnNilRequest Go generator option

[devin-ai-integration]

Summary

The Go SDK generator gained an opt-in config option, applyQueryDefaultsOnNilRequest. Go endpoints let callers pass nil for the request struct; until now that path skipped query-parameter encoding entirely, so documented query defaults (x-fern-default, e.g. include_totals=true or page/per_page) were never sent, which could break paginated responses. With the option enabled, a nil request is treated like a zero-value request struct, so the defaults go out on the wire. Default stays false, so existing behavior is unchanged unless opted in.

Adds one <ParamField> for the option to the Go generator configuration reference (fern/products/sdks/generators/go/configuration.mdx), in the existing alphabetical order. No SDK changelog entry, per convention.

Source: fern-api/fern#17256

Link to Devin session: https://app.devin.ai/sessions/8ad195fdf66e43c2bab0d738282afc84

[devin-ai-integration]

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[github-actions]

🌿 Preview your docs: https://fern-preview-devin-1785344877-go-query-defaults.docs.buildwithfern.com/learn

Here are the markdown pages you've updated:

• learn/sdks/generators/go/configuration