test(19-01): add classifyCampaign orchestrator tests (RED)
- Mock ./postgres-client (query-only) and ./mimecast-blast-radius
(getBlastRadius), routing staged rows by SQL substring per call
- Named tests for CLASSIFY-01 (returns exactly one verdict), D-02
(append-only INSERT, no ON CONFLICT), D-06 simulation allowlist
(KnowBe4 From-match + BSN Return-Path-match), positive-path D-03 THREAT,
D-03 known-bad-indicator OR-branch (auth pass, shared indicator across 2
messages), D-04 SPAM/UNWANTED split, and CLASSIFY-06 evidence bounding
lorentz
f6c954aa23