A legal term that might apply here is discharged through performance1.
A contract is said to be discharged when the parties no longer have any legal obligations to one another under the contract. There are several ways that a contract can be discharged, but the most common is through performance by both parties.2
This essentially means that the contract is over, because both3 parties have lived up to their respective sides of the agreement, and neither has any future obligation to the other. So you could say:
Contract Ended - (tenant) Discharged by Performance
N.B. I am not a lawyer; if you need this for real-world applications, and not just a work of fiction or similar, you should run it past a real attorney (or at least the folks at Law SE).
1 Linked definition from e-lawresources.co.uk; this is sometimes phrased *discharge by performance, as seen for example in this gradestack.com definition.
2 Accountlearning.com, "Discharge of a contract | Definition | Methods of discharge"
3 In some cases it might be possible for only one party to have been discharged by performance (when the other party hasn't lived up to their side of the agreement for some reason), but this term would still apply to the tenant in question.