May 19th, 2025

New this release:

• 🎉 (client, smithy-rs#4135) Introduce a new repeatedly() function to aws-smithy-mocks sequence builder to build mock rules that behave as an
  infinite sequence.

  let rule = mock!(aws_sdk_s3::Client::get_object)
      .sequence()
      .http_status(503, None)
      .times(2)        // repeat the last output twice before moving onto the next response in the sequence
      .output(|| GetObjectOutput::builder()
          .body(ByteStream::from_static(b"success"))
          .build()
      )
      .repeatedly()    // repeat the last output forever
      .build();

• 🐛 (client, aws-sdk-rust#1291) Removing the optimize_crc32_auto feature flag from the crc-fast dependency of the aws-smithy-checksums crate since it was causing build issues for some customers.

• 🐛 (client, smithy-rs#4137) Fix bug with enum codegen

  When the first enum generated has the @sensitive trait the opaque type
  underlying the UnknownVariant inherits that sensitivity. This means that
  it does not derive Debug. Since the module is only generated once this
  causes a problem for non-sensitive enums that rely on the type deriving
  Debug so that they can also derive Debug. We manually add Debug to
  the module so it will always be there since the UnknownVariant is not
  modeled and cannot be @sensitive.

• 🐛 (client, smithy-rs#4135) fix simple rules behavior with RuleMode::MatchAny