v0.9.1

Fixes allocation tracking reporting zero bytes when the user's global allocator is behind a #[cfg(...)] gate -- a common pattern with tikv-jemallocator and mimalloc.

Fixed

• Allocation tracking no longer reports zero when the user's #[global_allocator] is behind a #[cfg(...)] gate (#231)
  • Detection moved from string matching to syn AST walk
  • Cfg-gated allocators get a #[cfg(not(...))] fallback so every platform tracks allocations
  • Common pattern: #[cfg(target_os = "linux")] #[global_allocator] with tikv-jemallocator or mimalloc