Send back an empty delta response for initial ignore-me

[Jake-Shadle]

The initial request, which should be the only ignore-me request was being treated as a regular request. Note there is apparently no test that covers this case otherwise the bug wouldn't have been merged

[quilkin-bot]

Build Succeeded 🥳

Build Id: 2ad0aeb2-e68e-4af9-9f29-856000276292

The following development images have been built, and will exist for the next 30 days:

• us-docker.pkg.dev/quilkin/ci/quilkin:0.8.0-dev-15d1491

To build this version:

git fetch git@github.com:googleforgames/quilkin.git pull/892/head:pr_892 && git checkout pr_892
cargo build