ci: add mvnd support and update backend build

- Add installation and verification steps for mvnd in setup-deps action
- Update backend build step to use mvnd instead of mvn

.github/workflows/backend-build-test.yml

@@ -46,7 +46,7 @@ jobs:
       - uses: ./script/ci/github-actions/setup-deps
 
       - name: Build with Maven
-        run: mvn clean -B package -Prelease -Dmaven.test.skip=false --file pom.xml
+        run: mvnd clean -B package -Prelease -Dmaven.test.skip=false --file pom.xml
 
       - name: Upload coverage reports to Codecov
         uses: codecov/codecov-action@v4.0.1

script/ci/github-actions/setup-deps/action.yml

@@ -16,7 +16,7 @@
 # under the License.
 
 name: setup-deps
-description: Install host system dependencies
+description: Install host system dependencies (with mvnd)
 
 runs:
   using: composite
@@ -26,3 +26,18 @@ runs:
       with:
         distribution: "zulu"
         java-version: 17
+
+    - name: Install mvnd
+      shell: bash
+      run: |
+        MVND_VERSION=1.0.2
+        curl -sL https://downloads.apache.org/maven/mvnd/${MVND_VERSION}/maven-mvnd-${MVND_VERSION}-linux-amd64.zip -o mvnd.zip
+        unzip -q mvnd.zip
+        mkdir -p $HOME/.local
+        mv maven-mvnd-${MVND_VERSION}-linux-amd64 $HOME/.local/mvnd
+        echo "$HOME/.local/mvnd/bin" >> $GITHUB_PATH
+        echo "MVND_HOME=$HOME/.local/mvnd" >> $GITHUB_ENV
+
+    - name: Verify mvnd installation
+      shell: bash
+      run: mvnd --version