Changes from background agent bc-b2359e83-928d-4b0c-98ad-def143ac9c3a

[SoummoSsj]

Implements SpeedNet, a 3D-aware neural network for robust vehicle speed estimation, addressing perspective distortion and stationary vehicle speed inaccuracies.

The previous pipeline suffered from speed estimates increasing as vehicles approached the camera and assigning speeds to stationary vehicles due to a lack of proper perspective correction and depth awareness. This PR introduces a comprehensive system with a neural network that learns camera geometry, estimates 3D vehicle parameters, and uses temporal fusion for accurate, consistent speed predictions.

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[cursor]

Cursor Agent can help with this pull request. Just @cursor in comments and I'll start working on changes in this branch.
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