PR #38296 added four emit_log() calls using the old 3-arg signature, but
main had already changed emit_log to take a `stream: LogStream` argument
(#38312, "stop mislabeling stdout-style progress as stderr"). The two PRs
touched different lines, so the merge auto-resolved with no conflict and
left main unable to compile the bootstrap installer (E0061: 4 args expected,
3 supplied).
Supply the missing stream: Stdout for the update/install progress lines and
Stderr for the "could not auto-launch desktop" failure, matching the
convention from #38312. cargo check passes.
Co-authored-by: Cursor <cursoragent@cursor.com>