Release IntentCI v1.1.1

[mattfaltyn]

Summary

• prevent missing probabilistic confidence from inheriting the policy threshold
• add native fuzz coverage for the seven v1 property invariants
• record peak resident memory in release evidence
• update version, changelog, README, and release notes for v1.1.1

Validation

• complete v1 release validation passed locally
• 100% statement coverage
• all seven fuzz targets passed
• 20/20 acceptance criteria passed
• release mutation gate passed with zero live covered mutants
• Linux amd64 and macOS amd64/arm64 cross-compilation passed

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