Embedding CenarioVR into eAuthoring software

Lectora actually has an "Add CenarioVR" function.

For Storyline, you could use Insert >> Media >> Web Object. I have not tested this, but if you publish the CVR module as HTML I would expect it to work.

I have not used Captivate in almost 10 years now, so no opinion.

Absolutely! To publish to any of the major authoring tools, you would publish from CenarioVR as HTML, and then embed it in your project as a "Web Window" or "Web Object". As stated above, Lectora makes it a bit simpler with a dedicated CVR object.

The key here is that even though you may be publishing your final project as SCORM, you use an HTML to publish from CenarioVR, as only one thing can be talking SCORM at a time!