Companion App does not perform download request using token-auth endpoint

Issue Summary

Confluence does not include "token-auth" path in download URL provided to Companion.

Steps to Reproduce

1. Have a Confluence instance with transparent SSO (e.g. load balancer that redirects requests to SSO then back to Confluence)
2. Try to allow Companion requests to hit Confluence instances directly for URLS like "<base-url>/download/token-auth/attachments/*"

Expected Results

Companion should be able to download the file

Actual Results

Companion hits the SSO authentication for the download request.

Workaround

Option #1
Configure load balancer/reverse proxy to direct "<base-url>/download/attachments/*" URLs to Confluence bypassing the SSO.

Option #2
Upgrade Confluence Previews bundled plugin/app to attached version which includes this fix (update through "Manage apps" in Confluence administration by using "Upload app")
confluence-previews-11.2.3.jar