add missing api.max_page_size to config as IntOpt

[maxfactor1]

Background

This is a minor fix request to add the 'api.max_page_size' option to the config

Overview of this PR

This request allows the api.max_page_size config option to be used as intended by expressly defining the option, and a default value of '100' in config. Fix submitted to resolve issue #5327

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✅ maxfactor1
❌ Maxwell Buehler

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[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
1 out of 2 committers have signed the CLA.

✅ maxfactor1
❌ Maxwell Buehler

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[guzzijones]

multiple failed tests here. did you recreate the config?

[maxfactor1]

Honestly unsure what that's all about. The change was pretty tiny, what config would need to be re-created?