Mark cd61cbccb6 test(01-07): commit regenerated last_30sec.webm fixture against D-13 recorder ...

Replaces the stale fixture committed in 87909d9 (test(fix-a3): commit
debug-session test artifacts + stale fixture) — that one was captured
under the D-09..D-11 single-continuous-recorder lifecycle and froze
~1 s into playback per the resolved A3 cluster-alignment session.

This fresh fixture (1.6 MB, VP9 1142×1038) was produced by ./smoke.sh
against the D-13 restart-segments recorder (commits 5530292..872f25d):
three self-contained 10 s WebM segments concatenated by the SW into a
multi-EBML-header file the operator confirmed plays cleanly in Chrome.

Acceptance evidence:
- ffprobe -v error -f matroska -i tests/fixtures/last_30sec.webm → exit 0
- ffmpeg -v warning -i tests/fixtures/last_30sec.webm -f null - → exit 0
  with zero decoder errors; only the expected muxer DTS-monotonicity
  warnings at segment join boundaries (non-blocking — multi-EBML-header
  concat is the documented D-13 trade-off)
- Operator confirmed end-to-end Chrome playback clean (no ~1 s freeze)
- All 30/30 unit tests green incl. empirical webm-playback.test.ts gate

This closes the D-12 + A3 acceptance gates referenced in:
- .planning/debug/resolved/d12-blob-port-transfer-fails.md
- .planning/debug/resolved/webm-playback-freeze.md

2026-05-15 21:42:13 +02:00

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