Types of statistics in the page shouldn't be fixed to certain types

It is best for users to choose which types of statistical data they need, which can reduce disk usage or even expand existing statistical types

Start by locating the page-statistics implementation and identifying where the available statistical types are fixed. Check how statistics are selected and persisted, then define the configuration needed for users to choose types and verify that storage usage changes accordingly. No specific source file or test is named in the issue.

Written by the indexing model from the issue text.