ci: add pull-request test workflow

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: Marcin

.github/workflows/pull-request.yml

@@ -0,0 +1,26 @@
+name: Test
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        java-version: ['17', '21']
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Java
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: ${{ matrix.java-version }}
+          cache: maven
+
+      - name: Run tests
+        run: mvn --batch-mode --no-transfer-progress test