Timestamp YAML manifest so we can access history, and also put this in tar file along with nodes/edges files

[justaddcoffee]

Put date/timestamp in filename of YAML manifest, and tar it up with nodes and edges files in tar file

Note that I'm not including this with the RDF/ntriples file, since this isn't an archive

[kltm]

Towards the top of your pipeline, you have:

                            sh 'echo $START_DAY > dow.txt'

Once upon a time, you probably generated that variable at the beginning of the run; now it just remains as reminder of the original codebase.
I would note that you call date twice. While low probability now, in future cutting and pasting, or if you are unlucky, you can get different results. I would maybe suggest re-introducing the env variables like DATE to the start of the run, as you used to have above--it might make it a little easier as you slowly move towards versioning.

[justaddcoffee]

@kltm better?

[kltm]

@justaddcoffee Assuming that works, that's probably a safer way of doing things. At least in my mind.