Add redis caching to getting user notifications and projects [MOD-540] (#723)

* Add redis caching to getting a user's project ids

* Run `cargo sqlx prepare` to update the sqlx-data.json

* Add redis caching for getting user notifications

* Fix new clippy warnings

* Remove log that shouldn't have been committed

* Batch insert of notifications (untested)

* sqlx prepare...

* Fix merge conflict things and use new redis struct

* Fix bug with calling delete_many without any elements (caught by tests)

* cargo sqlx prepare

* Add tests around cache invalidation (and fix bug they caught!)

* Some test reorg based on code review suggestions

src/database/models/ids.rs

@@ -216,10 +216,10 @@ pub struct FileId(pub i64);
 #[sqlx(transparent)]
 pub struct PatId(pub i64);
 
-#[derive(Copy, Clone, Debug, Type, Deserialize)]
+#[derive(Copy, Clone, Debug, Type, Serialize, Deserialize)]
 #[sqlx(transparent)]
 pub struct NotificationId(pub i64);
-#[derive(Copy, Clone, Debug, Type, Deserialize)]
+#[derive(Copy, Clone, Debug, Type, Serialize, Deserialize)]
 #[sqlx(transparent)]
 pub struct NotificationActionId(pub i32);