[WIP] imprv: Use graphLookup for Page document operations

[hakumizuki]

PageCursorsForDescendantsFactory を廃止しました :wave:

同等の処理を $graphLookup で再実装してパフォーマンスを大幅に改善しました

[reg-suit[bot]]

reg-suit detected visual differences.

Check this report, and review them.

:red_circle::red_circle::red_circle::red_circle::red_circle::red_circle::red_circle::red_circle::red_circle::red_circle::red_circle::red_circle::red_circle::red_circle:

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What do the circles mean?

The number of circles represent the number of changed images.
:red_circle: : Changed items, :white_circle: : New items, :black_circle: : Deleted items, and :large_blue_circle: Passed items

How can I change the check status?

If reviewers approve this PR, the reg context status will be green automatically.