Release 17.3.1

• 🐞 Fixed orphaned child processes after end(). When end() was called (either explicitly or via the beforeExit handler), the synchronous process.on("exit") SIGKILL backstop was removed before async cleanup completed. If the parent process exited before graceful termination finished, child processes survived as orphans. The fix snapshots live PIDs before cleanup begins and keeps the backstop registered until async teardown succeeds.

Commits

• chore(dependabot): deleted (f9660ab)
• fix: resolve orphaned child processes after end() in BatchCluster (c5a4cc1)
• chore: update CodeQL action versions to v4.32.4 (0d940fd)
• feat: add handoff and TPP skills documentation; update CLAUDE.md with TPP workflow (e1ee3b8)
• chore(deps): update typedoc to version 0.28.17 and typescript-eslint to version 8.56.0 (d8ddaac)