docs(playback): playback-qa-1 close verified fallback qualification

docs/agents/backlog/playback-qa-1.json

@@ -1,10 +1,12 @@
 {
  "id": "playback-qa-1",
  "area": "playback-qa",
- "status": "in-progress",
+ "status": "done",
  "title": "Qualify local hosted-source fallback with independent regression and browser evidence",
  "blockedOn": null,
  "addedOn": "2026-10-20",
  "filedAt": "0c1dd7e86be3e28edc96aca47f7753a98990dde0",
- "notes": "QA granted14:49:35Z/consumed14:49:46Z after request13:43:52Z (65m43 to grant,11s pickup; storage release→dispatch grant39m57 foreground/wakeup lag). Merged unstable7f99c045→124be143; focused4/4,lint11/11 and full env -u NODE_TEST_CONTEXT UNIT_TEST_TIMEOUT_MS=60000 npm test exit0 all429 unit files. Regression025771a8; six isolated mutants rejected/restored. Browser Chromium+Firefox3 scenarios each passed bounded native VP8 decode; zero external requests, no real WebTorrent/full app/wholeStage3 qualification. Browser scheduling intervention recorded. Preparing unchanged normal queue submission and durable landing verification; no new item."
+ "notes": "Complete: submission64143f42 durable landed1bb3a4fc at15:02:17Z; unchanged normal install+npm test gate exit0, target ancestry exit0. Merged diagnostic429/429,focused4/4,lint11/11; six isolated mutants rejected/restored. Native Chromium+Firefox3 scenarios each passed local VP8 decode64x64/time>0 through mirror/substituted torrent transport,zero external requests. No real WebTorrent/full app/wholeStage3 qualification. Unique evidence includes early browser/gate scheduling intervention and corrected timing: wait65m43 to actual14:49:35 grant+11s pickup,storage release→dispatch grant39m57 wake lag. QA expensive slot released15:02:30Z; browser released13:40:46Z. No new item; dispatch to integrate shared status.",
+ "closedOn": "2026-10-20",
+ "landedSha": "1bb3a4fc452969f060c09a286b72b8cd7ac4123e"
 }