Review of 650a1d0: a member that only failed its tests got no preview, so the indexer held no manifest
of it, the assigner's composition only said it waits, and the check waited for ever. The preview is now
written whenever every build module's fetch merged; a member with no preview of a merge (a conflict, a
fetch that did not answer) makes the composition not run, said with the members it names, unawaited.
Claude-Session: https://claude.ai/code/session_01NcbgfJ9Gum47zkFKWRaovL
jschoubben