Content Warnings not handled for Articles

[hughrun]

Steps to reproduce the problem

1. Publish an ActivityPub Article with a content warning (summary);
2. View article in Hometown
3. See that the CW is simply listed as plain text above the rest of the post, which is also rendered as clear text
   ...

Expected behaviour

The summary from Articles should be passed through as a content warning and obscure the post

Actual behaviour

CW is listed in plain text and entire post is rendered.

Detailed description

This was originally reported as a bug in the BookWyrm repo (bookwyrm-social/bookwyrm/issues/2759).

However, I have tested it using a slightly modified version of Darius' express-activitypub code and it looks to be an issue at Hometown's end:

Specifications

Hometown v4.0.6+hometown-1.1.1