Fix UDP server hanging on SIGINT due to untracked background tasks#1

shugonta with Copilot wants to merge 3 commits into

claude/udp-fps-input-01WpGQXHF6hgWmSr39WrmQcishugonta/CS230-FPS-Project:claude/udp-fps-input-01WpGQXHF6hgWmSr39WrmQcifrom

copilot/fix-udp-server-ctrl-c-issueshugonta/CS230-FPS-Project:copilot/fix-udp-server-ctrl-c-issueCopy head branch name to clipboard