- reworks the `instances` table significantly, to remove a lot of stuff we weren't using, and add fields for storing delivery errors
- adds an `instance_settings` table that just stores local instance settings like title, description, etc, and uses this table for building responses to `/api/v1/instance` and and `/api/v2/instance`, instance metadata, etc
- passes a database connection to delivery workers so that they can store delivery errors or clear delivery errors on successful delivery
- adds admin instance endpoints `/api/v1/admin/instances` and `/api/v1/admin/instances/{instance}` for fetching admin view of instances
- adds setting panel stuff for viewing instances and whatnot
Relates to https://codeberg.org/superseriousbusiness/gotosocial/issues/2493
Reviewed-on: https://codeberg.org/superseriousbusiness/gotosocial/pulls/4741
Co-authored-by: tobi <tobi.smethurst@protonmail.com>
Co-committed-by: tobi <tobi.smethurst@protonmail.com>
tobi
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