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We need to implement SigV4 request signing support for the AWS SDK's Smithy middleware pipeline. Currently…

We need to implement SigV4 request signing support for the AWS SDK's Smithy middleware pipeline. Currently…: a task in LegoFlow-SWE (Harbor dataset). The context keys and types are already defined as part of the public API: payloadHashKey , SigningMetadata , and SetSigningMetadata . The error…

The task

The context keys and types are already defined as part of the public API: `payloadHashKey`, `SigningMetadata`, and `SetSigningMetadata`. The error types `HashComputationError` and `SigningError` must be used as described.

Part of Lego-X/LegoFlow-SWE.