Add auditable Hyperliquid v3.8 validation pipeline

[crowdcent-centaur]

Summary

• add point-in-time Hyperliquid validation, model training, walk-forward selection, and raw/unique score decomposition
• add the fixed v3.8 live deployment book with one scored prior-meta Transformer slot and four experimental slots
• add fail-closed deployment safeguards, optional training dependencies, and comprehensive regression coverage

Test plan

• uv run pytest tests/test_validation.py tests/test_validation_training.py tests/test_validation_v38.py tests/test_validation_v38_decomposition.py tests/test_validation_v38_deployment.py tests/test_validation_v38_pool.py tests/test_validation_v38_sequence.py tests/test_validation_v38_walkforward.py tests/test_v38_synthetic_benchmark_snapshot.py -q (50 passed)
• uv run ruff check ... across validation source and tests
• clean install from the published branch and import v3.8 deployment APIs

Made with Cursor

[codecov]

Codecov Report

❌ Patch coverage is 78.01950% with 586 lines in your changes missing coverage. Please review.
✅ Project coverage is 79.26%. Comparing base (aa970b1) to head (86e65b9).

Files with missing lines	Patch %	Lines
...c/crowdcent_challenge/validation/v38/components.py	41.88%	66 Missing and 2 partials ⚠️
src/crowdcent_challenge/validation/v38/runner.py	79.72%	48 Missing and 11 partials ⚠️
.../crowdcent_challenge/validation/training/models.py	66.89%	39 Missing and 9 partials ⚠️
src/crowdcent_challenge/validation/v38/pool.py	73.61%	27 Missing and 16 partials ⚠️
...rc/crowdcent_challenge/validation/v38/objective.py	71.83%	20 Missing and 20 partials ⚠️
src/crowdcent_challenge/validation/atomic.py	58.88%	23 Missing and 14 partials ⚠️
src/crowdcent_challenge/validation/v38/dataset.py	64.28%	30 Missing and 5 partials ⚠️
.../crowdcent_challenge/validation/v38/book_search.py	74.40%	16 Missing and 16 partials ⚠️
...c/crowdcent_challenge/validation/v38/deployment.py	71.15%	16 Missing and 14 partials ⚠️
...rc/crowdcent_challenge/validation/v38/contracts.py	71.91%	13 Missing and 12 partials ⚠️
... and 13 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #4      +/-   ##
==========================================
- Coverage   81.89%   79.26%   -2.63%     
==========================================
  Files           7       43      +36     
  Lines        1265     3931    +2666     
  Branches       85      425     +340     
==========================================
+ Hits         1036     3116    +2080     
- Misses        202      589     +387     
- Partials       27      226     +199     

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