fix(server,desktop): browser tools report why a page failed to load#18588

fix(preview): redact data: payloads from reported load errors

Merge origin/main (8acbefefc5) into fix/issue-18555

fix(preview): keep load failures tied to the current page

test(preview): tighten load failure regression coverage

Merge remote-tracking branch 'origin/main' into feat/preview-load-error-v2

fix(server,desktop): browser tools report why a page failed to load