Signal does not. https://signal.org/bigbrother/santa-clara-county/

Tl;dr: Signal gave the court timestamps for three out of nine phone numbers that the court demanded data on. The timestamps were the dates three phone numbers last registered their accounts with Signal. That’s it. That is all the data there was to give.

This is why I use Signal. This is why I donate monthly to Signal.

Not temporary at all and works quite well. This is a well known, and common, technique.

“Loops Habit Tracker” can do all of these things.

DIY

Soke vrsions of DOS used a VCS named Source Library Manager, SLM, aka Slime. Later, it became Microsoft Delta, and eventually SourceSafe, then they switched to SourceDepot, which was a flavor of Perforce.