Fix AttributeError for proxy_url in get_config (#12578)
* Fix AttributeError for proxy_url in get_config (#12564)
When components are cached during example processing with
cache_examples=True, the component instances may not have the
proxy_url attribute properly initialized, causing AttributeError.
Use getattr with default None to safely access proxy_url, consistent
with how other optional attributes are accessed in the same method.
* add changeset
* lint
* Fix
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Co-authored-by: gradio-pr-bot <gradio-pr-bot@users.noreply.github.com>
Co-authored-by: Freddy Boulton <41651716+freddyaboulton@users.noreply.github.com>
