Add kagglehub optional signing features (#1473)

ditto title

Add kagglehub optional signing features (#1473)

ditto title

Add kagglehub optional signing features (#1473)

ditto title

Fix kagglehub (#1471)

UV requires a separate flag for allowing prerelease packages to be
installed.

kagglehub install fails due to this, since sigstore (a dependency) needs
a prerelease package.
let's install it separate to allow prerelease installs.

 https://b.corp.google.com/issues/394382016

Fix kagglehub (#1471)

UV requires a separate flag for allowing prerelease packages to be
installed.

kagglehub install fails due to this, since sigstore (a dependency) needs
a prerelease package.
let's install it separate to allow prerelease installs.

 https://b.corp.google.com/issues/394382016

Fix kagglehub (#1471)

UV requires a separate flag for allowing prerelease packages to be
installed.

kagglehub install fails due to this, since sigstore (a dependency) needs
a prerelease package.
let's install it separate to allow prerelease installs.

 https://b.corp.google.com/issues/394382016

Bump `kagglehub` and add optional deps (#1460)

Per @jplotts, I'll wait to merge this until after the holidays

http://b/379756505

Bump `kagglehub` and add optional deps (#1460)

Per @jplotts, I'll wait to merge this until after the holidays

http://b/379756505

Bump `kagglehub` and add optional deps (#1460)

Per @jplotts, I'll wait to merge this until after the holidays

http://b/379756505

newer fastcore needed to match nbdev

http://b/384745227