ci: bootstrap GH-managed prek cache image workflow#566
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corbt
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Feb 17, 2026
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Summary
Trying to add megatron dependencies in uv. This makes CI expensive, so I am trying to build a cached image with megatron related dependencies which does the heavy lifting. This can be updated by a dedicated workflow when megatron dependencies are modified.
This PR is to add that workflow to main so #560 can test the workflow and CI.