The Savers Credit is based on eligible contributions you make to retirement accounts, including both Traditional and Roth IRA accounts.
It is likely that your educational institution will determine your full-time status if classes have ended yet final testing has not yet concluded. Presumably you remain an "enrolled" full-time student until the academic period concludes.
The disqualification for a student who was full time during any part of five months has been in place for several years.
See the citation below from the IRS website at:
https://www.irs.gov/uac/newsroom/plan-now-to-get-full-benefit-of-saver-s-credit-tax-credit-helps-low...
•A student cannot take the credit. A person enrolled as a full-time student during any part of 5 calendar months during the year is considered a student.
