fix(devcontainer): mark workspace as safe dir (#9136)

.devcontainer/setup.sh

@@ -1,5 +1,9 @@
 #!/bin/bash
 
+# Mark the current repository as safe for Git to prevent "dubious ownership" errors,
+# which can occur in containerized environments when directory ownership doesn't match the current user.
+git config --global --add safe.directory "$(realpath .)"
+
 # Install `nc`
 sudo apt update && sudo apt install netcat -y