Build a stable "<date>|<articleType>" collision key for a discovered run. Exposed so callers can look up a run's group without re-importing the grouping function.
"<date>|<articleType>"
Discovered run
Pipe-separated collision key
Build a stable
"<date>|<articleType>"collision key for a discovered run. Exposed so callers can look up a run's group without re-importing the grouping function.