`<some_id>.keyframe_insert()` now sends a notifier that animation data was changed, so that animation-related editors can properly refresh. Since this function is quite high-level (if necessary it creates the Action and FCurves), I thought this would be a suitable location for the notifier. If high keyframing speed is required, it is still recommended to use `FCurveKeyframePoints.insert(options={'FAST'})` instead.