Add GitHub Actions workflow for automated backend tests

Author: Dush1604

.github/workflows/backend-tests.yml

@@ -0,0 +1,67 @@
+
+name: Backend Tests
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    services:
+      postgres:
+        image: timescale/timescaledb:latest-pg16
+        env:
+          POSTGRES_USER: netsentry
+          POSTGRES_PASSWORD: testpassword
+          POSTGRES_DB: netsentry_test
+        ports:
+          - 5432:5432
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.13'
+
+      - name: Install dependencies
+        working-directory: backend
+        run: |
+          pip install -r requirements.txt
+
+      - name: Apply database schema
+        working-directory: backend
+        env:
+          PGPASSWORD: testpassword
+        run: |
+          psql -h localhost -U netsentry -d netsentry_test -f schema.sql
+
+      - name: Run tests
+        working-directory: backend
+        env:
+          DB_HOST: localhost
+          DB_PORT: 5432
+          DB_NAME: netsentry_test
+          DB_USER: netsentry
+          DB_PASSWORD: testpassword
+          TEST_DB_NAME: netsentry_test
+          JWT_SECRET_KEY: test-secret-key-for-ci-only
+          JWT_ALGORITHM: HS256
+          JWT_EXPIRE_MINUTES: 60
+          MQTT_BROKER_HOST: localhost
+          MQTT_BROKER_PORT: 1883
+          TESTING: '1'
+        run: |
+          pytest tests/ -v
+