uv

538b0f10 - Remove `serde::Serialize` implementations for rkyv-able structs (#7663)

Remove `serde::Serialize` implementations for rkyv-able structs (#7663) ## Summary Random, but I noticed that we can remove a ton of serialize and deserialize derives by using `rkyv` for the flat-index caches. (We already use `rkyv` for these same structs in the registry cache.)