Check if value is numeric before converting to int

[AetherUnbound]

Fixes

Fixes an issue we've seen in production.

Description

We don't have tests for this yet, but I was able to check locally that a search which was previously erroring out is now returning results.

Testing Instructions

just up, then access this URL: http://localhost:8000/v1/images/?page=NaN&shouldPersistMedia=true&q=wolf

Checklist

• My pull request has a descriptive title (not a vague title like Update index.md).
• My pull request targets the default branch of the repository (main) or a parent feature branch.
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• My code follows the established code style of the repository.
• I added or updated tests for the changes I made (if applicable).
• I added or updated documentation (if applicable).
• I tried running the project locally and verified that there are no visible errors.

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[sarayourfriend]

LGTM. We should add a unit test for this too though.

[AetherUnbound]

LGTM. We should add a unit test for this too though.

Agree, I'll make an issue after this is deployed.