docs(sdks): document Go enableRequestBodyPagination option

[devin-ai-integration]

Summary

Go SDKs silently skipped auto-pagination when an endpoint's cursor or offset page property lives in the request body instead of a query parameter, so those APIs generated a plain single-response method and users had to hand-roll the paging loop. The Go generator now supports request-body cursor and offset pagination behind the new enableRequestBodyPagination option, bringing Go in line with the other languages. The option is off by default because turning it on changes affected methods' return types (from a response to a pager), keeping existing generated signatures stable until customers opt in.

Implements docs for: feat(go): opt-in auto-pagination for request body cursors and offsets (fern-api/fern#17352)

Pages changed

• fern/products/sdks/generators/go/configuration.mdx — new enableRequestBodyPagination <ParamField> (boolean, default false) covering what it enables, why it is off by default, and that nested body page properties (cursor: $request.pagination.cursor) remain unsupported and still generate a plain method. Links to the auto-pagination deep dive.
• fern/products/sdks/deep-dives/configure-auto-pagination.mdx — the "Generated SDK behavior" tabs only had TypeScript and Python, so a Go-only sentence had nowhere natural to live. Added Go, Java, and C# tabs, and folded the enableRequestBodyPagination requirement into the Go tab. Each snippet matches the pager API in the generated SDKs: *core.Page[T] with Iterator() / GetNextPage(ctx) (Go), SyncPagingIterable<T> with iteration, streamItems(), and nextPage() (Java), Pager<T> as an IAsyncEnumerable<T> consumed with await foreach (C#).

No SDK changelog entry added (generated automatically for the generators). Vale and fern check --warnings pass with no new findings.

Link to Devin session: https://app.devin.ai/sessions/fbc018f9c6694760843c05d716902c69

[devin-ai-integration]

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[github-actions]

🌿 Preview your docs: https://fern-preview-devin-1786813681-go-request-body-pagination.docs.buildwithfern.com/learn

Here are the markdown pages you've updated:

• learn/sdks/deep-dives/auto-pagination
• learn/sdks/generators/go/configuration