Attest release artifacts with build provenance#52
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Add actions/attest-build-provenance step to the release workflow so main.js and styles.css are signed via Sigstore and verifiable with `gh attestation verify`. Grants the job id-token: write and attestations: write to support OIDC token minting and recording.
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Summary
actions/attest-build-provenancestep to the release workflow somain.jsandstyles.cssare signed via Sigstore and verifiable withgh attestation verify.id-token: writeandattestations: writefor OIDC token minting and attestation recording.Test plan
1.0.9) and confirm the workflow run shows an "Attest release artifacts" step that succeeds.gh attestation verify main.js -R gtritchie/bulk-propertiesandgh attestation verify styles.css -R gtritchie/bulk-propertiesagainst the published assets.