Release IntentCI v1.1.0

[mattfaltyn]

Summary

• set the source and release version to v1.1.0
• add changelog, migration, acceptance, roadmap, README, and curated release notes
• publish Linux and macOS performance evidence with deterministic release assets

Release validation

• INTENTCI_RUN_MUTATION=1 GREMLINS_BINARY=/tmp/intentci-v1-tools/gremlins INTENTCI_BUILD_VERSION=1.1.0 ./scripts/validate_v1_release.sh /tmp/intentci-v1.1.0-final-evidence
• 100% statement coverage
• 20/20 acceptance criteria
• 303/303 release-critical mutants killed
• go vet ./... (isolated GOCACHE)
• Actionlint, ShellCheck, and git diff --check
• protected-main readiness run: https://github.com/hypertrial/intentci/actions/runs/30273342392

Independent review

No blocking findings. The diff is limited to release metadata, version defaults/tests, release documentation, and tag-workflow evidence publication.

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