Hello,I would like to ask about push notifications.If I want to send simultaneously e.g. 10 thousand push notifications, do I have this capability?Also, can push notifications interact with other apps? To explain this: If I want something to be done when a push notification is sent to another app, does Apple act as a middle man, or the other developer has to give me the tokens of his clients in order to send them the notifications directly?Thanks in advance!