Adapt ViTFly to encoded ZED depth maps

[gbin]

Summary

• consume the concrete compact ZedDepthMap payload
• decode u16 millimeter samples directly during the existing bilinear resize
• use the new depth format and bulk sample APIs without adding a per-frame allocation
• update the documented task contract and stride-aware unit test

Verification

• cargo +stable test --no-default-features task::tests
• cargo +stable clippy --no-default-features --all-targets -- --deny warnings

Stack:

• depends on Use compact typed depth-map encoding zed#4
• flight-controller consumer: Migrate flight controller to encoded ZED depth maps copper-rs#1244