Add S4FIFO Eviction Algorithm#443

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williamnixon20 wants to merge 11 commits intofacebook:mainfrom

williamnixon20:s4fifo-fresh-pr

Commits on Apr 20, 2026

Commits on Apr 22, 2026

frequency counter
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Commits on Apr 23, 2026

Commits on Apr 28, 2026

Commits on May 1, 2026

move small cache guard to after feature collection
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Commits on May 6, 2026

apply extreme predictions
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Commits on May 8, 2026

evicting cache map ghost
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