Fix bugs I made in POT slab allocator#1

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YasInvolved wants to merge 8 commits intomasterfrom

slab_allocator_fixes

Commits on Mar 16, 2026

restore old changes I accidentally overwritten by readme merging
YasInvolved
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Commits on Mar 17, 2026

rewriten POTSlabAllocator from the ground up, still requires edge-cases implementations
YasInvolved
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