Initial shared instances backend (#3800)

* Create base shared instance migration and initial routes

* Fix build

* Add version uploads

* Add permissions field for shared instance users

* Actually use permissions field

* Add "public" flag to shared instances that allow GETing them without authorization

* Add the ability to get and list shared instance versions

* Add the ability to delete shared instance versions

* Fix build after merge

* Secured file hosting (#3784)

* Remove Backblaze-specific file-hosting backend

* Added S3_USES_PATH_STYLE_BUCKETS

* Remove unused file_id parameter from delete_file_version

* Add support for separate public and private buckets in labrinth::file_hosting

* Rename delete_file_version to delete_file

* Add (untested) get_url_for_private_file

* Remove url field from shared instance routes

* Remove url field from shared instance routes

* Use private bucket for shared instance versions

* Make S3 environment variables fully separate between public and private buckets

* Change file host expiry for shared instances to 180 seconds

* Fix lint

* Merge shared instance migrations into a single migration

* Replace shared instance owners with Ghost instead of deleting the instance

apps/labrinth/src/routes/internal/flows.rs

@@ -4,7 +4,7 @@ use crate::auth::{AuthProvider, AuthenticationError, get_user_from_headers};
 use crate::database::models::DBUser;
 use crate::database::models::flow_item::DBFlow;
 use crate::database::redis::RedisPool;
-use crate::file_hosting::FileHost;
+use crate::file_hosting::{FileHost, FileHostPublicity};
 use crate::models::pats::Scopes;
 use crate::models::users::{Badges, Role};
 use crate::queue::session::AuthQueue;
@@ -136,6 +136,7 @@ impl TempUser {
 
                 let upload_result = upload_image_optimized(
                     &format!("user/{}", ariadne::ids::UserId::from(user_id)),
+                    FileHostPublicity::Public,
                     bytes,
                     ext,
                     Some(96),