compile_recursive_glob

Compile a glob pattern into a per-entry matcher for a recursive walk.

Path.rglob(pattern) is equivalent to Path.glob("**/" + pattern), so the pattern matches at any depth (e.g. *.py matches src/app/main.py). Prefix the pattern with **/ and compile it with globstar support so a matcher can be applied to each visited entry while walking the tree, letting the caller enforce a deadline on every entry instead of only on matched paths.

Depth (GLOBSTAR) and dotfile matching (DOTMATCH) mirror Path.rglob: DOTMATCH is required because wcmatch excludes dotfiles by default whereas stdlib rglob includes them. Brace expansion (BRACE) is an intentional divergence from rglob — {a,b}.py expands here but Path.rglob treats the braces literally — chosen so glob matches the include-glob semantics of compile_grep_include_glob.