Payments/subscriptions support (#943)

* [wip] Payments/subscriptions support

* finish

* working payment flow

* finish subscriptions, lint, clippy, etc

* docker compose

src/routes/v3/version_creation.rs

@@ -394,8 +394,8 @@ async fn version_create_inner(
         ",
         builder.project_id as crate::database::models::ids::ProjectId
     )
-    .fetch_many(&mut **transaction)
-    .try_filter_map(|e| async { Ok(e.right().map(|m| models::ids::UserId(m.follower_id))) })
+    .fetch(&mut **transaction)
+    .map_ok(|m| models::ids::UserId(m.follower_id))
     .try_collect::<Vec<models::ids::UserId>>()
     .await?;