TEMPORARY: Get Hegel from new-protocol branch

Author: DRMacIver

.github/workflows/ci.yml

@@ -102,7 +102,7 @@ jobs:
           python-version: '3.13'
       - name: Install hegel
         run: |
-          pip install git+ssh://git@github.com/antithesishq/hegel.git
+          pip install git+ssh://git@github.com/antithesishq/hegel.git@DRMacIver/new-protocol
           pip install pytest
       - name: Build conformance binaries
         working-directory: tests/conformance/rust

build.rs

@@ -61,7 +61,7 @@ fn ensure_hegel() -> PathBuf {
         .args([
             "pip",
             "install",
-            "git+ssh://git@github.com/antithesishq/hegel.git",
+            "git+ssh://git@github.com/antithesishq/hegel.git@DRMacIver/new-protocol",
         ])
         .arg("--python")
         .arg(venv_path.join("bin").join("python"))