Allow max file results to be zoekt count limit

What does this MR do and why?

Allow max file results to be zoekt count limit.

Otherwise, searches the filter for a specific file will have broken pagination. For example: https://gitlab.com/search?group_id=9970&scope=blobs&search=go+1.24+file:go.mod

References

https://gitlab.slack.com/archives/C07SBRDSJUS/p1754069354117529

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Before	After

How to set up and validate locally

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