Failure to resolve refrences in schema

please include the error message that was appearing before this change to illustrate the URL connectivity was to blame and that there wasn't a problem with the Schema file that was downloaded by Newtonsoft jsonSchema

_Originally posted by @seantleonard in https://github.com/Azure/data-api-builder/pull/2099#discussion_r1531190897_


When trying to read the schema using JsonSchema.FromUrlAsync(<>). we were getting error stating, "unable to resolve refrences". Need to look into why it was happening.

Start with the JsonSchema.FromUrlAsync() call described in the issue and trace the "unable to resolve references" error. No file or test is named; done means determining whether URL connectivity or the downloaded schema causes the failure and documenting the relevant error message.

Written by the indexing model from the issue text.