[NTG-context] LUA API for page numbers

Hi everyone, I have recently migrated my PhD dissertation from LaTeX to ConTeXt. In LaTeX I was using kaobook, a template with lots of margin notes, but I was frustrated with the automatic placement of the notes. I implemented a system using overlays that automatically places the notes using lua. To know where the ideal placement should be (if they do not interact with each other), I use lua to insert a latelua whatsit that uses lpdf.getpos() to get the coordinate on the rendered page. However, I haven't found a way to get the page number using lua, and the tex macro \pagenumber is unreliable near pagebreaks. Furthermore, it would be helpful to know if there is a way to access the position and sizes of figures at the end. Thanks, Luc