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c477663211
When the push gateway rejected a device's App Attest attestation or assertion, it logged the reason only at debug level. In production that left a bare `401 invalid_attestation` in the access logs, with no sign of which check failed. We hit this diagnosing an internal iPhone that never received push. Its enrollments failed with repeated `401`s, and the gateway logs could not say why. Rejections now log at warn level with: - `operation`: `attestation` or `assertion` - `reason`: the existing category, for example `certificate` or `identity` - `detail`: the specific failed check, for example `invalid AAGUID` or `invalid App ID` Malformed base64 now has its own `encoding` reason. The size, base64 and challenge checks that run before full verification now take the same path. Previously they rejected without logging anything. Without `RUST_LOG`, the gateway now defaults to `error,buzz_push_gateway=warn`, which keeps every target's errors plus the gateway's own warnings. Previously the default showed only errors, and the Helm chart sets no `RUST_LOG`, so a default deployment would have dropped these warnings. The HTTP response is unchanged and stays a uniform `invalid_attestation`. The logged fields are fixed strings, with no device or request data. Companion iOS PR [#8629](https://github.com/block/buzz/pull/8629) stops a device from replaying the same rejected enrollment indefinitely. ### Validation - Added tests: a single-test binary checks the emitted JSON warning (level, operation, reason, detail) through `AppAttestVerifier::verify_attestation`, for malformed base64, an empty proof, and malformed CBOR. Another checks that the default filter keeps gateway warnings and dependency errors, drops dependency warnings, and still honors an explicit `RUST_LOG`. Both fail when the warning is downgraded to debug or the default filter loses its `error` fallback. - The existing push gateway suite passes locally, including the App Attest rejection tests. Clippy is clean. 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Signed-off-by: Tom Brow <tomb@block.xyz>