v0.4.5

Fixed

• Hot-swap debug logging no longer runs on the audio thread.
  handle_swap() executes from process_block() on the audio thread,
  where its ~10 fprintf(stderr, "[VM] …") calls allocate + lock (not
  real-time-safe) and flooded stderr on every program swap/crossfade
  during live coding. These traces are compiled out by default; define
  CEDAR_VM_SWAP_LOG=1 to restore them when debugging a swap/crossfade
  issue.