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/v3/collections.rs

@@ -4,7 +4,7 @@ use crate::database::models::{
     collection_item, generate_collection_id, project_item,
 };
 use crate::database::redis::RedisPool;
-use crate::file_hosting::FileHost;
+use crate::file_hosting::{FileHost, FileHostPublicity};
 use crate::models::collections::{Collection, CollectionStatus};
 use crate::models::ids::{CollectionId, ProjectId};
 use crate::models::pats::Scopes;
@@ -12,7 +12,7 @@ use crate::queue::session::AuthQueue;
 use crate::routes::ApiError;
 use crate::routes::v3::project_creation::CreateError;
 use crate::util::img::delete_old_images;
-use crate::util::routes::read_from_payload;
+use crate::util::routes::read_limited_from_payload;
 use crate::util::validate::validation_errors_to_string;
 use crate::{database, models};
 use actix_web::web::Data;
@@ -413,11 +413,12 @@ pub async fn collection_icon_edit(
     delete_old_images(
         collection_item.icon_url,
         collection_item.raw_icon_url,
+        FileHostPublicity::Public,
         &***file_host,
     )
     .await?;
 
-    let bytes = read_from_payload(
+    let bytes = read_limited_from_payload(
         &mut payload,
         262144,
         "Icons must be smaller than 256KiB",
@@ -427,6 +428,7 @@ pub async fn collection_icon_edit(
     let collection_id: CollectionId = collection_item.id.into();
     let upload_result = crate::util::img::upload_image_optimized(
         &format!("data/{collection_id}"),
+        FileHostPublicity::Public,
         bytes.freeze(),
         &ext.ext,
         Some(96),
@@ -493,6 +495,7 @@ pub async fn delete_collection_icon(
     delete_old_images(
         collection_item.icon_url,
         collection_item.raw_icon_url,
+        FileHostPublicity::Public,
         &***file_host,
     )
     .await?;