Replaces the 4-step DAG (check-cache → compile on CPU → warmup GPU →
train on GPU) with a single pod on the L40S that does everything:
git fetch → incremental cargo build (~3s warm) → train.
Eliminates: separate compile node, node autoscale wait, binary
transfer, fxcache step. The ci-builder image has CUDA 13.0 devel +
Rust — compilation and training use the same CUDA libs.
The cargo-target-cuda PVC provides incremental build cache across
runs. LD_LIBRARY_PATH strips the stubs dir so real CUDA libs load.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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