* Use `[]byte` for generated request bodies when the source schema has `format: byte`
* Gzip-compress request bodies when `Content-Encoding: gzip` is set
* Require that all models returned as error conditions in our API implement the `error` interface
* Move the implementation for `api.HealthCheck` out of `ping.go` and into `api/error.go`
Co-authored-by: William Baker <55118525+wbaker85@users.noreply.github.com>
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