fix(container-release): retry cosign sign on transient ghcr 5xx#6
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cosign writes the image signature to ghcr.io's referrers API, which intermittently returns 502/503 under load. A single failure aborted the whole release after the image was already pushed, forcing a manual re-run (against the zero-manual policy). Wrap the sign in a 5-attempt loop with exponential backoff (10s..160s). Re-signing is safe: a transient upload failure leaves no signature, and an extra keyless signature on a digest verifies fine. Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com> Signed-off-by: Sebastian Hoß <seb@xn--ho-hia.de>
Mirror the container-release retry: the keyless sign-blob occasionally fails on a transient Fulcio/Rekor 5xx, aborting the release after the image is published and forcing a manual re-run. Wrap it in the same 5-attempt exponential-backoff loop; each attempt writes a fresh bundle. Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com> Signed-off-by: Sebastian Hoß <seb@xn--ho-hia.de>
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cosign writes the image signature to ghcr.io's referrers API, which intermittently returns 502/503 under load. A single failure aborted the whole release after the image was already pushed, forcing a manual re-run (against the zero-manual policy). Wrap the sign in a 5-attempt loop with exponential backoff (10s..160s). Re-signing is safe: a transient upload failure leaves no signature, and an extra keyless signature on a digest verifies fine.