Adds Arc.dev, BC T-Net, Eluta, iCIMS tenants, QAJobsBoard, and SmartRecruiters
manifests with registry/settings/UI wiring; registers full extractor list in
smoke-extractors and documents supplementary board access paths. Aligns Careerjet
v4 with the url query parameter and fixes strict typing in QAJobsBoard.
Co-authored-by: Cursor <cursoragent@cursor.com>
