[feature] Populate hashtag stats to track tag usage over time

[Jasdemi]

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

Apps such as Phanpy or Pachli show how often hashtags have been used when composing a new post.
In GTS the count for all hashtags is 0.

What's your GoToSocial Version?

0.16.1-SNAPSHOT+git-f770051 🦥

GoToSocial Arch

arm64 Docker

What happened?

In GTS all hashtag count is 0.

What you expected to happen?

This is how it looks like using an mastodon.social account:

How to reproduce it?

With either https://phanpy.social/ or the Pachli app.

Anything else we need to know?

No response

[tsmethurst]

Right now we always just return an empty history array on a tag because we don't track "trend" stuff like that, so it makes sense that you see 0 usage for all hashtags. We could add hashtag history in future but it's probably going to be pretty low priority.

[tsmethurst]

Also since it was a conscious choice not to bother counting stuff + adding it to the history array, i'll change this to a feature request issue.

[tsmethurst]

Relevant link: https://docs.joinmastodon.org/entities/Tag/#history