Persist and serve pdf captures from the GET _screenshot/ DSL - #6121

Persist and serve pdf captures from the GET _screenshot/ DSL#6121

lukemelia wants to merge 3 commits into

cs-12976-pagepdf-capture-leg-with-pagebyte-bounds-capture-only-viacardstack/boxel:cs-12976-pagepdf-capture-leg-with-pagebyte-bounds-capture-only-viafrom

cs-12977-persist-pdfs-to-mediacache-and-serve-from-the-getcardstack/boxel:cs-12977-persist-pdfs-to-mediacache-and-serve-from-the-getCopy head branch name to clipboard