Add pipeline and results diagrams to model card

.gitattributes

@@ -1,2 +1,4 @@
 *.onnx filter=lfs diff=lfs merge=lfs -text
 *.pt filter=lfs diff=lfs merge=lfs -text
+figures/circuits-pipeline.png filter=lfs diff=lfs merge=lfs -text
+figures/circuits-results.png filter=lfs diff=lfs merge=lfs -text

README.md

@@ -63,6 +63,9 @@ reads what is drawn. Accuracy on real sheets is moderate and varies with draftin
 
 ## How it works
 
+![How it works](figures/circuits-pipeline.png)
+
+
 1. **CircuitNet** is a 1.7M-parameter U-Net that takes grayscale input and produces stride-2
    outputs:
    - `peaks`: 13 per-class centre heatmaps, already 3×3-NMS'd (12 symbol classes plus the home-run arrowhead).
@@ -115,6 +118,8 @@ Per-class symbol detection:
 | `data_outlet` | 260 | 0.996 | 0.965 | **0.981** |
 | `homerun_arrow` | 7257 | 0.956 | 0.995 | **0.975** |
 
+![Measured results](figures/circuits-results.png)
+
 ## Results on real E-sheets (held out)
 
 **United States.** The model was tested on **5 plan regions from 4 real US sheets it never