Tags: everettmorgan/retry

Fix legacy dist-tag name in README

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Make publish workflow idempotent and fix legacy dist-tag name

npm rejects dist-tags that parse as a semver range, so 1.x releases
now publish under "legacy" instead of "v1". The workflow also skips
publishing when the version already exists on the registry, so
re-running a release (or cutting one after a manual publish) stays
green instead of failing on a duplicate version.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>