Refactor API response descriptors to use resource classes

- Updated response descriptors in various endpoints to utilize specific resource classes instead of generic JsonResponse.
- Changed response types for friendship, guild, party, and support issue endpoints to their respective resource classes.
- Incremented version number in manifest.json to 0.5.3 for the new changes.

docs/wiki/Control-Plane-Client.md

@@ -14,6 +14,7 @@ client.presence();  // PresenceClient
 client.players();   // PlayersClient
 client.batch();     // BatchClient
 client.cache();     // ApiDataCacheClient
+client.reactivePlayerCache(); // ReactivePlayerCacheHooks
 ```
 
 ## Handwritten Domain Clients
@@ -35,10 +36,32 @@ client.presence().shutdown(instanceId, "restart");
 `PlayersClient`
 
 ```java
-PlayerSessionProfile profile = client.players().getSessionProfile(playerId);
-List<PlayerEntitlement> entitlements = client.players().getEntitlements(playerId);
+PlayerSessionProfile profile = client.players().sessionProfile(playerId);
+List<PlayerEntitlement> entitlements = client.players().entitlementsIndex(playerId);
 ```
 
+`AssetsClient`
+
+```java
+AssetPackVersion active = client.assets().getActivePack(packKey);
+List<AssetPackVersionFile> files = client.assets().getPackVersionFiles(active.id());
+```
+
+## Reactive Player Cache
+
+`reactivePlayerCache()` is intended for Hytale ECS/event handlers that know player state changed and need cache freshness now, not after a TTL expires.
+
+```java
+PlayerCacheContext context = new PlayerCacheContext(playerId, playerRef, entityStore);
+
+client.reactivePlayerCache().onPlayerJoin(context);
+client.reactivePlayerCache().onPermissionChanged(context);
+client.reactivePlayerCache().onSanctionChanged(context);
+client.reactivePlayerCache().onNotificationCreated(context);
+```
+
+These hooks invalidate and prewarm the player-scoped cache entries for permission snapshots, moderation sanction snapshots, and notifications.
+
 ## Error Handling
 
 Transport errors use checked `ControlPlaneException` subclasses: