Raven recommended I just tuck the sensor pigtail inside a deep-well socket instead of working around it in solving my sensor removal conundrum, but apparently deep-well sockets in his part of the world are deeper than they are here. I couldn't get the line folded into the socket at all without risking crimping the line.
But, I did have a bright idea (ding) and instead of following the oft-repeated advice of cutting a slot into a spare 13mm socket, I simply ground the corner off of a spare 3/8" extension. I don't know about you, but I have way more spare extensions than I do spare 13mm sockets, and grinding the corner down was a trivial exercise with a standard angle grinder. I expect slotting the socket would have been way more work, and would possibly have weakened the socket too much to be useful. Also, this sensor sits socketed deep underneath a cooling tin, and I sortof doubt I could have gotten the lead out of the socket and the tin without hacking the tin up.
So the solution I've got here worked great. Bonus.

That works.
Is that a Sam-O-Flange?
WTF is a samoflange?
--D