Check employment with Jev: judge each role, then let code decide

The insight: a LinkedIn profile does not have "a current job", so "is this person still at the company?" cannot be read off one field. Clay's own Enrich person returns current_experience as a list, and the profiles it returns show why. Measured on real profiles: a CEO who is also a university trustee; a CTO who also holds an adjunct university post; a founder whose co-founder title at an earlier company still has no end date beside two newer roles. And a role nobody closed stays "current" forever: a person who left in 2025 without editing the profile still reads as employed. A single is_current flag, or a model asked "does this person work at X?", answers these wrong in both directions.

The evidence for the fix is Jev's own documentation. TypeSafe publishes what Jev 1.13 is bad at: comparing dates, counting items in a list, and reading loosely. Its advice for a list is to ask one question per item and combine the answers in code. So: