ReplyReceiver
A BroadcastReceiver that handles inline replies from notifications.
This receiver is triggered when a user replies to a message directly from a notification. It extracts the reply text and the contact key from the intent, sends the message through SendMessageUseCase — so notification replies get the same pipeline as in-app sends (history save, durable queue, transforms) — and then refreshes the conversation notification so the sent reply appears in place (falling back to dismissal if the send or refresh fails).