Azure.Sdk.Tools.TestProxy_1.0.0-dev.20240610.1

Resolve Digest Round Trip Issues (#8325)

* we have a test case that actually exercises the round tripping
* we have successful round trip repro of the problem. time to figure out how to fix it
* ensure that content type 'application/vnd.docker.distribution.manifest.v2' is not treated as a text type, ensuring that the whitespace gets stored exactly as-is