docs(perception): record Rerun projection acceptance

docs/10_EXTERNAL_PERCEPTION_WORKER.md

@@ -9,7 +9,7 @@ K1
   -> bounded missioncore.compute-job/v1
   -> replaceable GPU worker / Triton
   -> content-addressed missioncore.compute-result/v1
-  -> future optional Rerun derived layer
+  -> optional validated Rerun derived layer
 ```
 
 The GPU worker cannot discover, provision, start or stop a K1. It receives an
@@ -61,6 +61,29 @@ The result manifest binds the detection artifact's length and SHA-256. A repeat
 with the same identity validates the existing directory and returns it without
 calling Triton.
 
+## Recorded Rerun projection
+
+Mission Core discovers only results whose validated job names the opened
+session. Before projection it revalidates the complete job/result binding,
+artifact digests, ordered timestamps and result metrics. It then reconstructs
+the exact fMP4 epoch, verifies decoded dimensions/frame count with `ffprobe`,
+decodes exactly the admitted number of RGB frames and rejects boxes outside the
+image.
+
+The optional `perception.rrd` endpoint returns either HTTP 204 or one complete,
+bounded RRF2 stream for the opened Rerun recording ID. The browser never splits
+that stream and never replaces the base recording when the optional layer is
+absent or rejected. Accepted frames are logged under `/perception/camera` on
+the canonical zero-based `session_time` timeline; `Image` and `Boxes2D` rows
+therefore seek with the point-cloud archive. Generated overlays are a private,
+content-addressed cache and remain rebuildable from the immutable job/result.
+
+In **Наблюдение → Пространственная сцена**, a **Распознавание** button appears
+only after the layer has been admitted. It switches the active native Rerun view
+between the camera/detections and the point cloud. TEST007's accepted fragment
+occupies approximately `01:07.351–01:12.848`; Rerun's latest-at query retains
+the last admitted frame after that short fragment.
+
 ## Accepted model profile
 
 - YOLOX-S official ONNX from upstream release `0.1.1rc0`;
@@ -76,10 +99,9 @@ accepted for obstacle avoidance, free-space estimation or safety decisions.
 
 ## Open gates
 
-1. Import the accepted result as an optional session-timestamped Rerun layer.
-2. Qualify TEST007's 206-second epoch and record throughput/resource telemetry.
-3. Replace SSH/SCP with a reviewed authenticated worker transport.
-4. Add bounded live queues, sampling/drop policy and acquisition-isolation
+1. Qualify TEST007's 206-second epoch and record throughput/resource telemetry.
+2. Replace SSH/SCP with a reviewed authenticated worker transport.
+3. Add bounded live queues, sampling/drop policy and acquisition-isolation
    tests.
-5. Introduce tracking, segmentation/free-space, calibration and point-cloud
+4. Introduce tracking, segmentation/free-space, calibration and point-cloud
    models as separate versioned pipelines.