The pg driver returns PostgreSQL DATE columns as ISO datetime strings
(e.g. '2026-07-03T00:00:00.000Z'). The formatResolutionDate helper was
strictly matching YYYY-MM-DD only, so these were classified as 'invalid'.
Now the helper extracts the date prefix from ISO datetime strings before
validating, correctly classifying them as 'set' with the YYYY-MM-DD value.
Updated the property test filter and added an example test for the case.