Chore: Remove sdk reference proxying

[ben-fornefeld]

Note

Medium Risk
Changes rewrite/sitemap behavior for /docs/sdk-reference paths, which can affect production routing and SEO indexing if misconfigured. Test coverage was added/updated, but incorrect domain/path config could still cause broken docs links or missing sitemap entries.

Overview
Stops treating the SDK reference as a separately proxied site: removes SDK_REFERENCE_DOMAIN and its middleware rewrite rule, relying on the main DOCUMENTATION_DOMAIN for /docs/* rewrites.

Updates sitemap generation to not include SDK reference URLs by introducing SITEMAP_EXCLUDE_CONFIG and filtering out excluded path prefixes when merging external sitemaps; adds a unit test asserting /docs/sdk-reference* is omitted. Integration tests were updated to assert middleware rewrites send docs traffic (including /docs/sdk-reference/*) to the docs host.

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Project	Deployment	Actions	Updated (UTC)
web	Ready	Preview, Comment	Mar 13, 2026 5:37am
web-juliett	Ready	Preview, Comment	Mar 13, 2026 5:37am

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[chatgpt-codex-connector]

Re-export SDK_REFERENCE_DOMAIN or remove remaining imports

Removing SDK_REFERENCE_DOMAIN from @/configs/rewrites breaks the existing named import in src/app/sitemap.ts:13-17, which is still used to build the sites list (src/app/sitemap.ts:60). In environments that compile or bundle the sitemap route, this causes a module export/import mismatch (SDK_REFERENCE_DOMAIN no longer exported), so the app cannot build or serve that route until the consumer is updated in the same change.

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