- read.rs: reserve with try_reserve_exact, so a raised chunk limit on a
small target cannot abort before parsing; the capped reservation and a
deep, retry-heavy nest of broken lists are pinned by tests.
- write.rs: a tree past the 32-bit container size fails with TooLarge
before anything is serialised.
- aepx.rs: drop an unneeded local and lifetime annotation.
vangel76
efa0c94d2b