Make data-page hidration a new request

[PillFall]

When the page load for the first time, all the data needed for rendering are written as JSON inside the data-page attribute.

From what I have been able to test, if this data is relatively big (like 1000 chars), it could make the DOM parsing significantly slower, triggering bad performance, increasing the FCP in almost 3 seconds.

I propose, instead of loading the data in the data-page attribute, fetch the data as a new XHR request, as the subsequent page visits are.

I know the backend (probably) must handle the same exact request twice, but we can control the backend processing speed and power, but not the frontend.