rom-parity-audit

Run a full ROM 2.4b6 → Python parity audit on a single ROM C source file (e.g. act_obj.c, scan.c, special.c). Use when starting a new file-level audit, when the user says "audit X.c", or when ROM_C_SUBSYSTEM_AUDIT_TRACKER.md shows a P0/P1 file as Partial/Not Audited. Encodes the 5-phase methodology: (1) read ROM C and Python entry point, (2) write per-file audit doc with gap table, (3) ID gaps with stable IDs (FILE-001 etc.), (4) close gaps via integration tests + implementation (defer to rom-gap-closer per gap), (5) flip tracker rows and write a session summary. Not for single-gap closures — use rom-gap-closer for those.