- Changed the logging format in `trackbert.py` to include date, time, and message level.
- Added debug messages to show the number of events retrieved for a tracking number.
In this commit, logging and error handling have been added to the `notify` function in order to provide more visibility into notification sending. If the `notify-send` command is not found, a warning message is logged instead of sending a notification. Additionally, logging statements have been added to various functions throughout the script to provide visibility into the execution flow.
