CI / test (pull_request) Failing after 3m40s
- Exponential backoff retry logic (100ms, 200ms, 400ms... capped at 2s) replacing fixed 100ms delay between retries - Explicit REFUSED and NOTIMP response types (RespREFUSED, RespNOTIMPL) surfaced as terminal results with user-visible messages - CNAME loop detection: walking the ancestor referral chain before following a CNAME prevents infinite recursion; produces RespCNAMELoop - DNAME record support: synthesize CNAME target from DNAME mapping when the server omits the RFC 6672 synthesized CNAME record - ErrorMessage field on Response for surfacing error details to users - Fix resolveGlueViaSystem timeout bug: deadline.Sub(deadline) was always 0; replaced with time.Until(deadline) - DNAME records excluded from hasFinalAnswer so DNAME-only responses are correctly classified as RespCNAMEFollow - Text and JSON output updated with labels for all new response types - Tests: CNAME loop (2-step and direct), REFUSED, NOTIMP, graceful degradation (partial and total server failure), DNAME synthesis, IsNameInChain, backoffDelay, ResponseClassification strings Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Co-authored-by: multica-agent <github@multica.ai>