Unintended behavior for --delete-older-than.

[ammargit93]

Description

There seems to be a bug in the --delete-older-than flag.
It deletes all conversations regardless of their age.

Steps to Reproduce

1. Create multiple conversations at different timestamps.
2. Run:

   go run . --delete-older-than <some time duration>
   

Expected behavior:

in my case, conversations older than 1h should be deleted. aka "Top 5 anime to watch", "This is conversation1".

Actual behavior:

all of them are deleted.

Version

v1.8.1

Environment

Windows11