socket io stuff entered

backend/socket.io/roomCache.socket.ts

@@ -0,0 +1,8 @@
+import type { RoomId } from "./types.socket.js";
+
+export const MAX_HISTORY = 20;
+export const FLUSH_INTERVAL = 100; // 50ms change higher if needed
+
+export const roomHistory = new Map<RoomId, unknown[]>();
+export const roomBuffers = new Map<RoomId, any[]>();
+export const roomFlushTimers = new Map<RoomId, NodeJS.Timeout>();