- Apply rustfmt-style line wrapping across dynamic and fixed pool implementations,
  worker modules, and builder/state files.
- Normalize long expressions, closures, and conditionals for readability and
  consistency with the existing style guide.
- Reflow multi-line comments and simplify benchmark helper formatting while
  preserving the original benchmark scenarios and assertions.
- Update copyright headers to a unified block-comment variant and keep generated
  API/docs comments synchronized with wrapped lines.