CompanyMetricDeltaOutput
One metric's movement for a company.
delta is null when either side has no figure, which is not a delta of
0 — render an empty cell rather than "no change", or a company whose ARR was
never set reads as one that did not move.
- impactType: stringenumrequired
Impact label. 'new' is never returned for companies.
valuesnewchurnupselldownsellnoChange - currentType: numbernullable
Value now
- deltaType: numbernullable
current - previous; null when either side is absent
- previousType: numbernullable
Value at the period start

