// Package dns provides low-level DNS query primitives, response decoding, root
// server discovery, and type constants used throughout ExploreDNS.
//
// The package is organised around four concerns:
//
//   - types.go     — DNS record-type constants and helpers (QNameType, etc.)
//   - query.go     — Query / IterativeQuery and retry/back-off logic
//   - resolver.go  — Resolver interface plus BasicResolver and CachingResolver
//   - decode.go    — DecodeResponse, ResponseClassification, and related helpers
//   - roots.go     — DiscoverRoots for bootstrapping iterative traversal
package dns