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## 1.49.7

**`(fix):`** Materialize optional and nullable literal query/header parameters in generated
snippets and wire tests so they are set on the request and serialized on the wire.
Previously a direct optional literal (e.g. PKCE's `code_challenge_method=S256`) was
treated as a no-op and left unset, so it was never sent even though the generated
WireMock stub asserted it, causing generated wire tests to fail immediately after
generation. Required literals remain hardcoded in the request implementation.