fix: do not retry for reveal 404, will clear existing form entries

[ivyjeong13]

• Addresses Model Configuration page reloads automatically clearing existing entries #843
• useSWR continues to retry if it receives an error response but 404 response is valid for /reveal (means no credential found for that model provider)
• avoid retry for 404 (causing clear out of form and retry is unnecessary, we revalidate reveal after user submits form)

[ryanhopperlowe]

thank you!