[bug] `media-description-min-chars` config not enforced at toot time

[noerw]

Describe the bug with a clear and concise description of what the bug is.

It seems #369 broke the media-description-min-chars config var, as I was able to post a toot with an image, without entering a image description.

What's your GoToSocial Version?

0.5.2 git-c31f219

What you expected to happen?

It shouldn't be possible to toot without an image description if media-description-min-chars: 1 is configured.

→ the POST /toot endpoint (pardon, idk what its URL actually is) should enforce the media-description-min-chars config on all referenced media items.

How to reproduce it?

• run GtS with media-description-min-chars: 5 in config.
• log in with pinafore 2.2.1
• upload image
• toot
• observe a successful toot without image description

Anything else we need to know?

Previous disussion in #338

[tsmethurst]

Thanks for opening this! I'll investigate!