* fix(sandbox): scope ignore patterns to the search root in glob/grep
Rebuilt on top of current main so the changelog entry lands in the
Unreleased (2.2.0) Fixed section rather than the now-released 2.1.0 block.
* test(sandbox): cover the include_dirs glob branch at an ignored search root
The file.list_path branch only ran against a non-ignored tree, so a
regression there would go unnoticed. Two cases now exercise it with an
ignored root: the requested root keeps its contents, and ignored
descendants stay hidden.
