Let me see if I have this right - did you put the bird on any grit before giving the scratch? (Oyster shell doesn't count - it dissolves). If not, I'd suspect that she doesn't have grit in there and that her system backed up.
Another thing is that any time you keep birds away from food, they're going to binge and eat until their crops are full like that. In her case, you want to keep crumbles in front of her all the time, free choice. Since she's possibly having crop issues, do not let her have any food that isn't very easily dissolved. In other words, if you put it in a glass of water and walk away for 10 minutes, you should come back and find it kind of puddled at the bottom of the glass. This means that boiled egg yolks are good (if mixed with water) but whites and scrambled eggs are not. Crumbles for now are good, scratch is off limits until she's well. Oatmeal is ok if you process it dry in the food processor before cooking.
Also be quite certain that you're really seeing impacted crop as the crop storage area is *supposed* to mix food and water so that the feed is wet before it goes into the proventriculus. So it will feel squishy like that in the summer when birds are drinking a lot of water and eating feed, especially if they binge.
This also means that if she feels light weight, you will want to add another feeding station so she has a place to go freely any time to eat and doesn't have to wait until other birds are out of the way. Otherwise she'll wait and binge.
Make sure tonight one last time by removing her food tonight. Then see if her crop is empty mostly or still full very early in the morning. Then *slowly* introduce feed back starting with a small amount of a damp mash including yogurt, water, crumbles. You could add a little boiled/mashed egg yolk, and a 1/2 teaspoon of babyfood applesauce to help clear out her system if it's slow. After she finishes the small amount of damp mash, give her some more then wait 10 minutes to let her feel full. And then finally give her the dry mash free choice and keep it there.
If the crop is still full in the morning, you will want to do the baking soda flush followed by a week of easily dissolved feeds, OACV in the water (1 teaspoon per gallon), and no solid feeds with that yogurt-damp-mash every day during that time, and of course keeping crumbles in front of her all the time after the first fast.
Feeding the crumbles first after the fast as a dampened mash will help it to go through to the next stages of the digestive tract more easily. It won't have to sit in crop storage until she drinks enough water.
