I have a DS8 who, like your daughter, loves learning new math and resists memorizing facts. His 2e-ness is autism, not ADHD, but some things are similar.
What we did for facts was make them a game. There is no way he would sit and memorize them like I remember doing as a kid with flash cards. We sing them in silly rhythms adding in "oh yeah, oh yeah" as we are doing other things like walking the dog or driving.
There are also computer games that give you cheers, prizes, or badges when you get a certain number of facts correct in a row. For example: EPGY has a little car race before every session that you can do over and over and Khan Academy gives you badges as you progress (but I'm not sure if you can do it over and over though). I've found other math fact games online that are similar...if your kid likes computer games, she will think they are fun instead of work. The main point is that repetition (as you know as a teacher) is the only way to get these facts to sink in with most kids.
Once they sink in, then hopefully she will be a little more content to "play the game" at school with their tests on facts. I know for my son, once he got it, he got it (you know, the gifted thing!) and he is now proud he can do 100 facts in 3 minutes instead of being frustrated that he only got 40 done in 5 minutes.
No amount of trying to convince him to "memorize them" worked for him. I had to make it a game and let that take over.
I have heard other people say that when their kids got to higher level math, they learned their facts at that time because they HAD to in order to do the rest of the math. So that's another option...?
As for adding something like that into your IEP, I don't know. DS has quite the extensive IEP, but I think putting something about math facts in there wouldn't fly.
Kate
