fix(fast-path): three bugs in FastPathFragmentWriter and _can_use_fast_path#43

FANNG1 wants to merge 4 commits into

daft-engine:maindaft-engine/daft-lance:mainfrom

FANNG1:fix/fast-path-type-erasure-and-collect-sideeffectFANNG1/daft-lance:fix/fast-path-type-erasure-and-collect-sideeffectCopy head branch name to clipboard