Use server-side bucket copy when freezing Spaces

[abidlabs]

• require huggingface_hub>=1.10.0 and use copy_files() for bucket-to-bucket media copies during freeze()
• keep freeze() documented as a point-in-time snapshot rather than a live mirror

cc @Wauplin for visibility and appreciation for the new copy_files() method!

[gradio-pr-bot]

🪼 branch checks and previews

•	Name	Status	URL
🦄	Changes	detected!	Details

[gradio-pr-bot]

🦄 change detected

This Pull Request includes changes to the following packages.

Package	Version
trackio	patch

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• Use server-side bucket copy when freezing Spaces

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‼️ Changeset not approved. Ensure the version bump is appropriate for all packages before approving.

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[HuggingFaceDocBuilderDev]

🪼 branch checks and previews

•	Name	Status	URL
	Spaces	ready!	Spaces preview

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Install Trackio from this PR (includes built frontend)

pip install "https://huggingface.co/buckets/trackio/trackio-wheels/resolve/f37bb263302ac73d44afa2fa7692385cc28ac729/trackio-0.21.1-py3-none-any.whl"

[HuggingFaceDocBuilderDev]

The docs for this PR live here. All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

[Wauplin]

Glad it already proves useful! 😀