[Uptime] Require runtime type checking on client API

[justinkambic]

Summary

Resolves #60395.

Code is WIP.

Checklist

Delete any items that are not applicable to this PR.

• Any text added follows EUI's writing guidelines, uses sentence case text and includes i18n support
• Documentation was added for features that require explanation or tutorials
• Unit or functional tests were updated or added to match the most common scenarios
• This was checked for keyboard-only and screenreader accessibility
• This renders correctly on smaller devices using a responsive layout. (You can test this in your browser
• This was checked for cross-browser compatibility, including a check against IE11

For maintainers

• This was checked for breaking API changes and was labeled appropriately

[elasticmachine]

Pinging @elastic/uptime (Team:uptime)

[kibanamachine]

💔 Build Failed

• continuous-integration/kibana-ci/pull-request
• Commit: 030d965
• Pipeline Steps (look for red circles / failed steps)
• Interpreting CI Failures

Failed CI Steps

• Build X-Pack Kibana
• Execute x-pack-intake
• Execute kibana-intake

History

• 💔 Build #46743 failed c332b30

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

[justinkambic]

There's been no movement on this PR for quite some time, and the issue it resolves is backlogged. Closing for now.