Track nested ignore-destructive-writes counters per Document across module evaluation and its cleanup checkpoint. Preserve explicit input streams, cross-realm Document identity, and writes from later tasks or pending top-level await continuations.
Validate root and child module behavior with five regression tests. The 149-case dynamic-markup WPT run gains four passes with unchanged remaining outcomes; update their recorded case status. cargo fmt, workspace all-feature clippy, and all 17835 nextest tests pass.
