Williams driver Franco Colapinto heads to the Mexico City Grand Prix knowing he’s under the microscope during each session for the final five races of the year. Unlike other drivers on the grid, Franco Colapinto is the only person who took his current position knowing it wouldn’t be an option for next year. Williams had already secured Alex Albon’s future and signed Carlos Sainz for 2025 before Colapinto was parachuted in to replace Logan Sargeant. What was meant to be a nine-race stint where the Argentinian was supposed to support Williams in the Constructors’ Championship has turned into one…