refactor(per-horizon): N_HORIZONS 5→3 — remaining ml-alpha tests
Five test files migrated to clear the last cargo check --all-targets errors:
- tests/multi_horizon_loader.rs:22,64 — hardcoded [usize;5] horizons literal
→ ml_alpha::heads::HORIZONS; for-loop bounds 0..5 → 0..N_HORIZONS
- tests/output_smoothness_grad_finite_diff.rs:198 — [0.1, 0.3, 1.0, 3.0, 10.0]
→ [0.1, 1.0, 10.0] preserving 100× span across horizons
- src/data/loader.rs:560,640 (inline lib tests) — hardcoded [30,100,300,
1000,6000] literal → crate::heads::HORIZONS
- tests/perception_overfit.rs:318,358 (audit-discovered 5-isms) —
cfg.seq_len * 5 → cfg.seq_len * N_HORIZONS
- tests/gpu_log_ring_invariants.rs:173 (audit-discovered) — payload field
name v["payload"]["raw_h30"] → "raw_h10" (matches gpu_log.rs schema
migrated in Task 5)
cargo check --workspace --all-targets: clean (only pre-existing third-party
cudarc cupti example error, unrelated).
cargo test -p ml-alpha --lib: 33 passed, 0 failed, 6 ignored — baseline.
Golden fixtures deferred to runtime regeneration:
- tests/fixtures/perception_forward_golden.bin (644 → 388 bytes post-rebase).
Test is #[ignore]-d and rewrites if missing; regenerate during Task 9
local validation by deleting the .bin and re-running with --ignored.
gpu_log.rs migration verified complete by Task 5 (no remnant 5-horizon
field names in payload_json decoders for RT_INPUT/RT_STATE/RT_OUTPUT).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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