fix: destroy ydoc after persisting to prevent memory leaks in worker

[EastSun5566]

Clean up the ydoc instance after persisting since getDoc creates a new one each time in consumeWorkerQueue:

y-socketio-redis/src/api.js

Lines 227 to 231 in 8a837ea

	async getDoc (room, docid) {
	const ms = extractMessagesFromStreamReply(await this.redis.xRead(redis.commandOptions({ returnBuffers: true }), { key: computeRedisRoomStreamName(room, docid, this.prefix), id: '0' }), this.prefix)
	const docMessages = ms.get(room)?.get(docid) || null
	const docstate = await this.store.retrieveDoc(room, docid)
	const ydoc = new Y.Doc()

y-socketio-redis/src/api.js

Line 293 in 8a837ea

const { ydoc, storeReferences, redisLastId } = await this.getDoc(room, docid)

ref: yjs/y-redis#36

[stanley2058]

Seems to be working! 🚀