page_modules_read_the_pointer_only_through_page_pointer treats any file
that mentions `.router.` as a page module, and failed on
workflows/ocr_web.rs: its `self.router` is the OCR pool's
ocr_route::Router, which hands each page's text to the run that sent it,
not the pages' PageRouter. Adding the file to PAGE_MODULES would put
the workers under the page-input checks, so the field is renamed
`runs` instead.
Tests: the page_pointer tests and all 808 pdfcraft-ui-egui lib tests
pass, and cargo check for wasm32-unknown-unknown builds.
bmh129
44d7fb996a