It still sounds like she’s saying “I’m a Jedi.”
Well I’ll be…I just double checked the subtitles on Disney+, and apparently the original line is “I’M all the Jedi.” All this time, I’ve thought it was “am all the Jedi.” Go figure.
Not that it really matters, I suppose. “I…I’m a Jedi” and “I…am a Jedi” both work fine grammatically. The big hurdle is making sure the reconstructed “a” in the new line sounds un-garbage-y.