Hot damn! Don’t you just love architects that don’t think about future maintenance?
What is the ground like at the bottom of the enclosure? Does it slope off drastically?
If it were fairly level I would say you would be best with an extension ladder with stantions/stand off stabilizers that you could rest on the frame rails, then use a WFP to reach the glass against the house. Depending on how long of a trad pole you have, I guess it could be done that way as well, but that would be super time consuming. Definitely need a carbon fiber pole to give you the reach.
What is your plan to tackle the interior of the sloped and rounded glass?