Add skip_inverted_ocr flag to opt out of the inverted Tesseract pass

Second-pass audit: SSE timing, OCR memory cap, filter robustness, CLI ordering

Fix CLI audio output: inline for single, bundle for zip, schema round-trip

Live progress bar (web SSE + CLI rich) and rename images dir to 'static'

Phase D: --min-gap, --max-frames, --skip-ocr flag parity

Phase A: unified metadata schema + vgm CLI