Is there a contact list purger client? For removing inactive and compromised pubkeys from your contact list.
#asknostr
Discussion
Quick searched a #DVM for this. Haven't tried it myself:
https://vendata.io/dvms/npub1mr56qs0nqvvcs7g5mvk8rl6jkql0mr6m2yjrgvlg6rus5skd6g8qc67d9w