I changed the embedding model.

Then embeddings are regenerated (nice!)

However, the numbers jump:

I know, that communicating progress is very hard.

Quick win:

if newNumber < oldnumber
  updateProgress(newNumber)

Otherwise, the numbers will "jump"

More nicer solution: make intervals:

"more than 2 minutes", "approx. 2 minutes", "approx. 1 minute", "30 seconds", "15 seconds", "5 seconds". - And map incoming numbers to that.

If easy: keep at week 1, if not easy: move to week 12.