pub async fn record(rec: &CoverageRecord)Expand description
Best-effort coverage write: POST rec (single JSON record) to
{index}/v1/coverage, HMAC-signed over the exact raw body bytes.
Returns () — deliberately not a Result — so it is UNMISTAKABLE that a
coverage write can never fail the resolve that triggered it. Every failure
path (no secret resolvable, serialization failure, transport error, non-2xx
response) emits exactly one warn! and returns; a 2xx emits a debug!.