A document may be very very large, due to a query block, embeds, or just a lot of blocks. It may also be very deeply nested, with no limit to depth in our hierarchy.

On the frontend, we display blocks in a mostly linear format, so we should have a flattened pagination.

This should enable a lower memory footprint and generally improve performance for super long documents. This connects with the hm://z6MkuBbsB1HbSNXLvJCRCrPhimY6g7tzhr4qvcYKPuSZzhno/tech-talks/react-virtualized-for-documents?v=bafyreifqu3zn7n26gveornniz5zw42nguwzxgnevclbrwgdpz3ux3zeyji&l project, because virtualized can tell the server when it needs new pages of content