fix(focus): a reopened window's focused terminal is presented first, and keys typed before its surface wait for it (REOPEN-F4) - #31707

One shadow release compile runs at a time and one waits; another dispatch now would evict the waiting one. The scheduled pick compiles the newest feat-cmux-next head when the slot frees, and a PR's fallback compile has its own group.
Source SHA: 22fc83665946e73020d77f8686157889dd4651f6