Output header at top of run

[cjcodeproj]

There should be an output header at the top of the id3scan program run in case people need to search the terminal output.

It would also be handy if the tool reported the process ID or some other unique sequence for a Find operation.

Rationale

A user runs the id3scan tool and immediately gets inundated with 30,000 lines of output, and never redirected stdout to a file before it was run.

An output header makes it easier to scroll back and find the start of the program run. And reporting the process id provides a unique search string that can be used if the shell offers a Find command.

[cjcodeproj]

Commit:

https://github.com/cjcodeproj/musicscan/commit/7a98e45128c455833effbb0ca305492605602ff3

[cjcodeproj]

Closing Notes

• Most of the relevant code change occurred in the stats.py file.
• Added changes to new MyPy warnings that came up when adding the --check-untyped-defs flag.