Step 1 of β migration — Option B (collector-native): collector
loads its own CudaFunction handles for the 3 SP14 producer kernels
plus their sub-kernels (4 total: aux_dir_acc_reduce,
aux_pred_to_isv_tanh, q_disagreement_update, alpha_grad_compute).
Mirrors SP13 hold_rate pattern at gpu_experience_collector.rs:1820.
Cleaner than cross-component launcher calls (avoids trainer-stream /
collector-stream race; no signature surgery on the existing trainer
launchers).
Cubin static decls flipped to pub(crate) so the collector can
re-load on its own stream. Compile clean; sp14_oracle_tests pass
(2/2 non-GPU; GPU-gated 7 ignored on RTX 3050 Ti host).
No launches yet — additive infrastructure commit.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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