A tool for exporting data from and importing data to Fediverse instances. Requires that they support the Mastodon API as implemented by GoToSocial. Intended for use with GoToSocial, but should work with other Mastodon-like instances, including Mastodon.

Description

This pull request overloads scheduled_at to allow creating statuses with creation times and ULIDs backdated to a previous time in scheduled_at, with the following caveats:

• Backfilled statuses aren't inserted into home or list timelines on the instance, and don't generate - - - Backfilled statuses aren't pushed to other instances through federation (but may be federated normally later through boosts, searches, etc.)
• Backfilled statuses may only mention or reply to the account creating them
• Backfilled statuses can't contain polls