testing new db approach on CI

.github/workflows/rust.yml

@@ -22,12 +22,17 @@ jobs:
       # added or changed files to the repository.
       contents: write
 
+    if: ${{ github.ref == 'refs/heads/main' }}
+
     steps:
       - name: Install Protoc
         uses: arduino/setup-protoc@v3
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.ref }}
+          fetch-depth: 0
+
+      - name: Checkout branch
+        run: git checkout -B $GITHUB_BRANCH origin/$GITHUB_BRANCH
 
       - name: Install sqlx
         run: cargo install sqlx-cli --version 0.6.2