Move `isDuplicatedMessage` from Event Handler Class to Saga

[huan]

I think the Event Handler Class will be instantiated from time to time when there's a new event, and will not keep/reuse the class instance for the next one.

So the isDuplicatedMessage will always forget the hash it calculated last time.

friday/src/core/sync-community-rooms/events/handlers/puppet-message-received.handler.ts

Lines 103 to 130 in 8338c8e

	/**
	* TODO: make sure it works as expected
	* Huan(20220228)
	*/
	private async isDuplicatedMessage (message: WECHATY.Message): Promise<boolean> {
	this.log.verbose('PuppetMessageReceivedHandler', 'isDuplicatedMessage(%s)', message.id)
	const sayable = await WECHATY.helpers.messageToSayable(message)
	if (typeof sayable === 'undefined') {
	return false
	}
	const payload = await WECHATY.helpers.sayableToPayload(sayable)
	if (typeof payload === 'undefined') {
	return false
	}
	const hash = crypto.createHash('sha256').update(
	JSON.stringify(payload),
	).digest('hex')
	if (this.lastMessageHash === hash) {
	return true
	}
	this.lastMessageHash = hash
	return false
	}

Should move to Saga.