- Delegate `exports` map generation to tsdown (`exports: true`) and simplify `package.json` to a bare `"." : "./dist/index.mjs"` entry plus `"./package.json"`; drop redundant `main`/`module` fields
- Add `sideEffects: false` to `package.json` so bundlers can tree-shake the package
- Enable `clean: true` and `failOnWarn: true` in `tsdown.config.ts` for a cleaner build and stricter warning enforcement
- Suppress the TypeScript 7.0 experimental-API warning emitted by tsdown
- Bump `typescript` dev dependency to `^7.0.2`
- Resolve `LookupResult` with an `attempts` array describing every network operation (phase, server, duration, error) so failures recovered by fallback remain visible
- Add `deadlineMs` option for a hard cap on total lookup time, distinct from per-operation `timeoutMs` (lowered default from 15 s to 10 s)
- Add `errorCode` (machine-readable `LookupErrorCode`), `errorPhase`, and `errorServer` to `LookupResult`; `timeout` covers both per-op and deadline timeouts, `aborted` means the caller's signal fired
- WHOIS timeouts now distinguish `connect` vs `read` stage and resolve with partial text (marked `partial: true`) when data arrived before the socket stalled
- Drop Node 18 support; minimum engine is now 20
jake