Loops phone-recorded mp4 files as local RTSP streams via MediaMTX +
ffmpeg so Vigilar's camera pipeline can be exercised end-to-end
without physical cameras. Reads camera ids from vigilar.toml,
expects videos/<id>.mp4 for each, writes a vigilar.sim.toml with
rtsp_urls rewritten to the local endpoints.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
