Validate Visible Value receipts in Decision Evidence

[sneakocom]

Summary

• validate opsle.value-receipt.v1 claim classes, trust, evidence, and aggregation semantics
• cross-check Context Firewall receipts against packet facts at merged revision 953c48f
• emit Decision Evidence validation receipts as optional sidecars with named stderr indicators

Verification

• npm run verify (60/60 tests; 24/24 conformance; 8 determinism checks)
• npm run interop (5/5 exact-revision cases)
• 9/9 Context receipts plus Decision receipt pass the research validator
• actionlint, gitleaks, diff and public-scope scans

No EXP-001 model/provider subjects were run.