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James Russo
f7d2260f9d
* feat(engine): stamp rendered files with hidden renderer provenance * fix(engine,producer): re-assert provenance at every container writer Review found that a no-audio MOV render still shipped untagged. The concat step is the last container write on that path (mux is skipped without audio, and applyFaststart only copies mov/webm), and the concat demuxer does not carry the chunks' container metadata through. The same hole applies to no-audio WebM, and to the in-process chunked encode in chunkEncoder, not just the distributed assemble path. mp4 was masked throughout because applyFaststart re-runs ffmpeg for that format and re-tagged the output. Tags the four remaining writers: the chunked-encode concat, and assemble's single-chunk remux, concat and cfr re-encode. Also corrects the trust claim. These are unsigned, freely writable keys, so a present tag means the file claims to be HyperFrames output, not that HyperFrames wrote it. Documented as an unauthenticated diagnostic hint rather than an authenticity or attribution boundary. Tests assert on the assembled file through the real assemble() path for both mov and webm; both fail without the concat fix. * test(engine): pin provenance through the in-process chunked concat Review noted the distributed writers are mutation-pinned but the encodeFramesChunkedConcat fix had no real-file regression of its own. Encodes 70 frames at a 30-frame chunk size so the concat step actually runs, then asserts the tags on the resulting no-audio mov. Fails without the concat fix, passes with it.