ci: @rainlanguage/float npm publish fails with 404 Not Found

[thedavidmeister]

Float autopublish gets through cargo publish successfully (rain-math-float 0.1.4 is on crates.io) but consistently fails at the Publish to NPM step:

npm error code E404
npm error 404 Not Found - PUT https://registry.npmjs.org/@rainlanguage%2ffloat
npm error 404 '@rainlanguage/float@...' is not in this registry.

The workflow uses secrets.NPM_PUBLISH_PRIVATE_TOKEN via secrets: inherit from the rainlanguage org. The token authenticates (no 401), but the resulting 404 on PUT indicates it lacks publish rights for the @rainlanguage scope.

Possible causes:

• Token scope doesn't include @rainlanguage package writes.
• The package has never been published before and creating a new scoped package requires a token with elevated org permissions or an explicit pre-creation step.
• There are two npm tokens in the org secrets; the wrong one is wired up.

Cargo half is healthy and unblocked; this is purely the npm-side concern.