Improve field boundary segmentation model

[oxkitsune]

TURRRRBOOOOOOO

<6000 params instead of 16k params
1.6ms per frame instead of 2.5ms per frame

0.015 lower MAE than before
0.03 lower std than before

Screen_Recording_2025-02-13_at_15.10.17.mov

[oxkitsune]

Needs a little more robust testing done

[oxkitsune]

Currently the model breaks down when the field edge is not in view. Might be related to the downsampling I'm doing. It's no longer multi level.