GHA workflow, backend only, attempt 1

.github/workflows/test.yml

@@ -0,0 +1,47 @@
+name: Tests
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - 'develop'
+      - 'main'
+      - 'release/**'
+      - 'feature/ci'
+  pull_request:
+    branches:
+      - 'develop'
+      - 'main'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
+      steps:
+        - uses: actions/checkout@v4
+        - name: Set up Java 21
+          uses: actions/setup-java@v4
+          with:
+            distribution: 'temurin'
+            java-version: '21'
+        - name: Download and run Blazegraph
+          run: |
+            wget https://github.com/blazegraph/database/releases/download/BLAZEGRAPH_2_1_6_RC/blazegraph.jar
+            java -jar blazegraph.jar &
+            sleep 5
+        - name: Set up Python ${{ matrix.python-version }}
+          uses: actions/setup-python@v4
+          with:
+            python-version: ${{ matrix.python-version }}
+            cache: 'pip'
+        - name: Install Python packages
+          run: |
+            python -m pip install --upgrade pip
+            pip install -r backend/requirements.txt
+        - name: Test with pytest
+          run: |
+            cd backend && pytest
+
+