feat: version the slowpages cache

[jennifer-richards]

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 88.84%. Comparing base (c7f6bde) to head (d9fbc0a). Report is 367 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7976      +/-   ##
==========================================
+ Coverage   88.78%   88.84%   +0.05%     
==========================================
  Files         296      304       +8     
  Lines       41320    41541     +221     
==========================================
+ Hits        36687    36907     +220     
- Misses       4633     4634       +1     

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