fix(server): worktree creation no longer times out fetching busy repos#18537

test(server): align executable fixture with working tree

Merge commit 'c274a251510e4bb035f8479a7f1e96443cd2503c' into takeover/18537

test(server): check fetch timeout after one clock advance

refactor(server): clarify remote fetch timeout rationale

Merge remote-tracking branch 'origin/main' into takeover/18537

fix(server): worktree creation no longer times out fetching busy repos