I tend to create a PR very early to give my team and myself an overview of what I'm working on, but I don't need to run the build pipeline until I'm ready.
The "Pull Request Handler" workflow shouldn't trigger if a PR is still a draft, otherwise there's no way to prevent the workflow from running after creating a PR. If other users rely on status checks for drafts (not sure if that's the case, skipping status checks until the PR is ready for review is the default behavior), the AL Go settings could include a flag that adds a condition for the workflow after running a system file update.