Default severity; users can override it via config.
DAMA data quality dimension.
One-line description shown by mdsc rules.
Default thresholds. Every number a rule uses must live here so users can
override it and every default must have a citation in references.
URLs to the real-world incident or literature justifying the rule and its thresholds.
Stable identifier, SCREAMING_SNAKE_CASE. Part of the public report contract.