core Release sha fix
version: v0.3.3
sha: b74a1ca
Patch (2026-09-10):
- #50 core Release: add optional sha to struct + KNOWN (match spec/fixtures/CLI), silence unknown-field warning
- reviewed by muse-spark-1.3-contributor in herdr tab review-50 (APPROVE); CI green on retry (flaky install test passed serial + rerun)
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