feat: use postcard for redis serde (#6956)

* redo error handling in xredis

* give proper types to metadata fields

* add round-trip tests

* inline loader enum metadata fields

* postcard roundtrips

* prepare

* bump redis key version

* serde-binhum

* clippy

* fix

* fix frontend checking existence of component fields rather than non-null-ness

* prepare

apps/labrinth/src/routes/v2/tags.rs

@@ -210,18 +210,9 @@ pub async fn game_version_list(
                     .into_iter()
                     .map(|f| GameVersionQueryData {
                         version: f.value,
-                        version_type: f
-                            .metadata
-                            .get("type")
-                            .and_then(|m| m.as_str())
-                            .unwrap_or_default()
-                            .to_string(),
+                        version_type: f.ty.unwrap_or_default(),
                         date: f.created,
-                        major: f
-                            .metadata
-                            .get("major")
-                            .and_then(|m| m.as_bool())
-                            .unwrap_or_default(),
+                        major: f.major.unwrap_or_default(),
                     })
                     .collect::<Vec<_>>();
                 HttpResponse::Ok().json(fields)