Electron Releases

• llvm-profdata merge --failure-mode=all only fails when every input is unreadable. A truncated child_pool-*.profraw (a child killed while dumping its counters at shutdown) was skipped with a warning and the thin profile was uploaded and rolled out. That is how 42-x-y win-x64 shipped a profile with ~16% of its usual counts from 42.8.1 onward (microsoft/vscode#331672); main win-arm64's latest profile is partially hit the same way.
• Switch to --failure-mode=any so a corrupt input fails the run and the branch keeps its previous state files until a clean collection lands.

Follow-up (separate PR): have the browser wait for children to dump their profiles at shutdown like Chrome's browser_shutdown.cc does, so the race stops happening in the first place.

Notes: none