feat(core): add fail-closed benchmark release decision contract

CHANGELOG.md

@@ -6,6 +6,7 @@ All notable changes to OriginWeave are documented in this file. The format follo
 
 ### Added
 
+- Added `originweave_core::release_acceptance`, a deterministic fail-closed benchmark release-decision contract that requires one authoritative result for every mandatory suite, bounds explicit buyer-visible limitations, rejects duplicate limitation claim identities, and rejects non-canonical surrounding whitespace rather than normalizing it into an alternate claim spelling.
 - Refreshed the product and technical gap baseline with the 2026-08-24 live inventory: 158 open pull requests (44 ready, 114 draft), refreshed exact base/head evidence for the #208–#222 release, enterprise-approval, BAP, and WARC/PROV chains, the governance issue additions #212 and #215, and a required-check provider-failure record for the fail-closed Strix re-dispatches on #208/#218/#220.
 - Added a dated product and technical gap baseline that separates protected-main implementation truth, active pull-request evidence, live review/check blockers, and the next buyer-visible Phase 1 acceptance work.
 - Refreshed the product and technical gap baseline with the current open-PR inventory and exact base/head evidence for the newest Chromium, BAP, extraction, WARC, and idempotency slices.
@@ -89,4 +90,4 @@ All notable changes to OriginWeave are documented in this file. The format follo
 - The hourly product agent has no Git metadata or repository authority. A separate post-verification publisher opens one PR and cannot approve or merge it.
 - The unprivileged OpenCode user is restricted to loopback egress during model execution, preventing runner-wide allow-listed endpoints from becoming direct source-exfiltration channels.
 
-[Unreleased]: https://github.com/ContextualWisdomLab/OriginWeave/compare/main...HEAD
+[Unreleased]: https://github.com/ContextualWisdomLab/OriginWeave/compare/main...HEAD

crates/originweave-core/Cargo.toml

@@ -14,6 +14,7 @@ publish = false
 path = "src/root.rs"
 
 [dependencies]
+unicode-normalization = "=0.1.25"
 
 [lints]
 workspace = true