Update design

Author: dmytroye

docs/design/tracker-service.md

@@ -130,15 +130,7 @@ See full schema: [`scene-data.schema.json`](../../tracker/schema/scene-data.sche
 }
 ```
 
-### Detection Data Passthrough
-
-The `confidence` field is passed through from the camera detection message to the corresponding track in the scene output. It is optional — when absent in the detection message it is omitted from the track output.
-
-| Field        | Type   | Description                                               |
-| ------------ | ------ | --------------------------------------------------------- |
-| `confidence` | number | Detection confidence score in \[0, 1\] from the AI model  |
-
-**Multi-camera limitation**: When a track is matched against detections from multiple cameras within the same time chunk, `confidence` reflects the last matched camera only (last-write-wins). This is an inherent limitation of the RobotVision attributes API used for per-track data storage.
+## Data
 
 In-memory only - no persistent storage. Stateless design for horizontal scalability.
 
@@ -149,6 +141,16 @@ In-memory only - no persistent storage. Stateless design for horizontal scalabil
 | Publish queue                  | Drained on shutdown (2s timeout)            |
 | Scene configuration            | Loaded at startup                           |
 
+### Detection Data Passthrough
+
+The `confidence` field is passed through from the camera detection message to the corresponding track in the scene output. It is optional — when absent in the detection message it is omitted from the track output.
+
+| Field        | Type   | Description                                               |
+| ------------ | ------ | --------------------------------------------------------- |
+| `confidence` | number | Detection confidence score in \[0, 1\] from the AI model  |
+
+**Multi-camera limitation**: When a track is matched against detections from multiple cameras within the same time chunk, `confidence` reflects the last matched camera only (last-write-wins). This is an inherent limitation of the RobotVision attributes API used for per-track data storage.
+
 ## Operations
 
 ### Health Checks