My '94 Bonneville SE brakes drag for what seems several seconds after I release them.

So far, they do seem to release completely as they are not getting hot just driving down the road. I have several other issues I need to tear into the front end to resolve, but I'd like to get some pointers on this before I try to do all of it at once.

Other issues: worn tie rod end, warped rotor, broken wheel stud, failed ABS sensor... I think there'* more, but I don't remember.

Those are all straightforward R&R issues.

Are the dragging brakes likely caused by crud in my calipers? I had that once on another car of mine. I just want to be sure if I do a normal "Calipers/Pads/Rotors" brake job I won't be overlooking something.

I haven't tried the brakes yet with the front end in the air to be sure which side is dragging or if they both are.

very likely it could be an old brake line hose.

They start to come apart internally and can act like a one way valve.

Yes indeed, that is a common problem

Here is a link to some choices, it all depends on what you want to pay i guess