Should I worry about uneven disc brake pad wear? My bike was squeaking from the front wheel area when I tilted it to one side or another, but not when I rolled forward or used the brakes.

I figured it was probably my disc brakes so I took them out to clean them and one looks really worn down. See pics. Specifically the bottom one which looks really worn at the bottom right. Should I worry?
Park Tool recommend the brake pads be at least 1mm thick. SRAM and Shimano have slightly different recommendation I think so look up the specs on your particular model of brakes.

I'd definitely be concerned by the asymmetrical wear. The squeaking when the bike is canted over is also indicative of an issue. I'd start by checking the front wheel hub for any play in the hub bearings. Make sure the wheel is installed correctly, then hold it off the ground, grab the tire/rib and push and pull side-side. You shouldn't be able to feel any movement between the wheel and fork.