Core 4.1.0-RC.6 ships user notifications (QAlerts.notify,
NotificationSignal and friends; QRun-IO/qqq#1125). The qbit's sink now
implements core's notify path, so a QAlerts.notify from any qbit reaches
the notification queue, inbox, channels, quiet hours and preferences.
The rest of the stand-in package com.kingsrook.qbits.alerts.spi goes
(NotificationSignal, NotificationAudience, NotificationCategory,
NotificationSeverity, AlertLink, package-info), and so does
AlertsRuntime.sink().
Breaking for anything that used com.kingsrook.qbits.alerts.spi; its only
consumer, qbit-easypost-tracking, moved to core in #16 there.
Closes#15 (architecture review QRun-IO/qqq#1150, F3 and F12).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>