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/sync/friends.rs

@@ -14,7 +14,7 @@ use redis::{RedisWrite, ToRedisArgs, ToSingleRedisArg};
 use serde::{Deserialize, Serialize};
 use tokio::sync::mpsc;
 
-pub const FRIENDS_CHANNEL_NAME: &str = "friends:v3";
+pub const FRIENDS_CHANNEL_NAME: &str = "friends:v4";
 
 #[derive(Serialize, Deserialize)]
 pub enum RedisFriendsMessage {

apps/labrinth/src/sync/status.rs

@@ -5,7 +5,7 @@ use redis::AsyncCommands;
 use xredis::RedisPool;
 
 const EXPIRY_TIME_SECONDS: i64 = 60;
-const USER_STATUS_NAMESPACE: &str = "user_status:v3";
+const USER_STATUS_NAMESPACE: &str = "user_status:v4";
 
 pub async fn get_user_status(
     user: UserId,