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

.github/workflows/rust-ci.yml

@@ -407,6 +407,19 @@ jobs:
           brew upgrade
           brew --version
 
+      # 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
+        # The Bash wrapper is not available on Windows.
+        if: ${{ !startsWith(matrix.runner, 'windows') }}
+        shell: bash
+        run: |
+          set -euo pipefail
+          dotslash -- fetch exec-server/tests/suite/bash
+
       - uses: dtolnay/rust-toolchain@1.90
         with:
           targets: ${{ matrix.target }}