fix(observation): admit bounded LAB chunk coverage

2026-07-23 22:34:07 +03:00
parent 082b7057da
commit 5a29a536a2
4 changed files with 104 additions and 14 deletions
@@ -222,8 +222,41 @@ The 144.54-second step is viewer-container publication from already computed
 results, not detector, semantic or fusion inference. It is completed before
 operator handoff. Warm UI openings reuse the resulting 7,882,010-byte Rerun
 overlay. The synchronized base recording contains exact range markers, so the
-host timeline is a 59.962-second comparison window and cannot advance into a
-static post-E21 tail.
+host timeline is intended to be a 59.962-second comparison window and cannot
+advance into a static post-E21 tail.
+
+### Operator admission regression and repair
+
+The first E21.3 browser handoff exposed one additional boundary condition.
+Rerun `rrd split` preserves complete Arrow chunks so that all split outputs
+still sum to the source recording. The verified bounded RRD therefore contains
+a leading boundary chunk beginning at 34.756228209 seconds even though its
+declared operator window begins at 35.421857292 seconds. Its final timestamp is
+the declared 95.383857292 seconds.
+
+The original browser admission gate required both decoded endpoints to equal
+the declared endpoints within 1 ms. Download and decode consequently reached
+100%, but the scene could never be admitted because the harmless 665.629 ms
+leading chunk spill failed the start equality check.
+
+The repaired contract admits a digest-verified RRD when its decoded range
+*covers* the declared window. The host timeline and playback controller are
+then clamped to the declared 35.421857292–95.383857292-second window, and
+autoplay starts at the declared boundary rather than at the preserved chunk
+edge. Missing coverage at either boundary still fails closed.
+
+Browser acceptance on the production build at `127.0.0.1:8000`:
+
+- three clean catalog-to-E21.3 openings completed;
+- the second and third openings reached `Визуализатор готов` in about 0.5 s;
+- no opening remained at `Загрузка и декодирование · 100%`;
+- the operator timeline was exactly `00:00.000 / 00:59.962`;
+- 2D objects, segmentation and 3D cuboids were enabled together and rendered
+  in the synchronized composition;
+- camera/AI presentation changed while playback advanced;
+- browser console errors after all three openings: 0;
+- frontend unit tests: 151 / 151 passed; TypeScript check and production build
+  passed.

 ## Evidence