fix: add test that verifies that codex-exec-mcp-server starts up

.github/workflows/rust-ci.yml

@@ -369,6 +369,18 @@ jobs:
 
     steps:
       - uses: actions/checkout@v6
+
+      # Some integration tests rely on DotSlash being installed.
+      # See https://github.com/openai/codex/pull/7617.
+      - name: Install DotSlash
+        uses: facebook/install-dotslash@v2
+
+      - name: Pre-fetch DotSlash artifacts
+        shell: bash
+        run: |
+          set -euo pipefail
+          dotslash -- fetch codex-rs/exec-server/tests/suite/bash
+
       - uses: dtolnay/rust-toolchain@1.90
         with:
           targets: ${{ matrix.target }}