is it customary to test people's car for an alignment if they're just getting an oil change and headlight wire replaced?
No, I've never experienced that before! If she mentioned the car was pulling to one side, maybe, but if not, that's like half the labor, just putting the alignment plates on and running the scan.
It does look like it was out, just not by much. But "not by much" can mean chewed up tires in a year's time. I was too lazy and cheap to pay for an alignment, thought setting my car's toe using toe plates after a tie rod change was good enough. Tire ended up wearing almost through the outer layer on the inside, where I couldn't see what was happening. Cost me way more in the end! (new tires)
Some shops print these with colors, green for "in spec" and red for "out of spec". It just makes it easier to visualize. Some places don't even give you the print. I definitely prefer when they automatically give you a print and the print has colors. You could search for a shop that does that, but there are worse ways this shop could have gone about this. I'd be annoyed, too, but the vehicle does appear to have needed an alignment