Incorrect forwarding of signals: npm still runs after cancelling sfw

[marcbachmann]

Cancelling the sfw execution using CTRL+c does not stop npm process

$ sfw npm ci
(node:79268) Warning: Code cache data rejected.
(Use `sfw --trace-warnings ...` to show where the warning was created)
Protected by Socket Firewall
⠦^C

$ # CTRL+c pressed here and shell is already ready for new input, but then new logs of npm still appear
npm warn deprecated level-concat-iterator@3.1.0: Superseded by abstract-level (https://github.com/Level/community#faq)
npm warn deprecated level-errors@3.0.1: Superseded by abstract-level (https://github.com/Level/community#faq)
npm warn deprecated encoding-down@7.1.0: Superseded by abstract-level (https://github.com/Level/community#faq)
npm warn deprecated memdown@6.1.1: Superseded by memory-level (https://github.com/Level/community#faq)
npm warn deprecated level-codec@10.0.0: Superseded by level-transcoder (https://github.com/Level/community#faq)
npm warn deprecated deferred-leveldown@7.0.0: Superseded by abstract-level (https://github.com/Level/community#faq)
npm warn deprecated levelup@5.1.1: Superseded by abstract-level (https://github.com/Level/community#faq)
npm warn deprecated abstract-leveldown@7.2.0: Superseded by abstract-level (https://github.com/Level/community#faq)
npm warn deprecated leveldown@6.1.1: Superseded by classic-level (https://github.com/Level/community#faq)
npm error process terminated
npm error signal SIGINT
npm error A complete log of this run can be found in: ~/.npm/_logs/2025-12-17T16_20_01_061Z-debug-0.log