Massachusetts officials would mandate students and families complete the Free Application for Federal Student Aid or a state version for undocumented students—or at least note that they’re opting out, under proposed public high school graduation requirements. Filling out the FAFSA is key for students to qualify for federal financial aid, and often also state aid, to attend college. The recommendation is from the K–12 Statewide Graduation Council’s final report, released last week by Democratic Gov. Maura Healey.