ci: add E2E test job to CI workflow

Add e2e-tests job to GitHub Actions CI workflow:
- Runs after lint and test jobs pass
- Uses PostgreSQL service container
- Runs E2E tests with pytest markers
- Runs performance tests separately
- Docker job now depends on e2e-tests

Implements Issue #43 Phase 1.

Author: Sakeeb91

.github/workflows/ci.yml

@@ -130,10 +130,84 @@ jobs:
           uv pip install twine
           twine check dist/*
 
+  e2e-tests:
+    name: E2E Tests
+    runs-on: ubuntu-latest
+    needs: [lint, test]
+    services:
+      postgres:
+        image: postgres:15-alpine
+        env:
+          POSTGRES_USER: test_user
+          POSTGRES_PASSWORD: test_password
+          POSTGRES_DB: test_db
+        ports:
+          - 5432:5432
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+
+      - name: Install uv
+        run: pip install uv
+
+      - name: Cache uv dependencies
+        uses: actions/cache@v4
+        with:
+          path: ~/.cache/uv
+          key: ${{ runner.os }}-uv-e2e-${{ hashFiles('requirements.txt') }}
+          restore-keys: |
+            ${{ runner.os }}-uv-e2e-
+            ${{ runner.os }}-uv-
+
+      - name: Install dependencies
+        run: |
+          uv pip install -r requirements.txt
+          uv pip install aiosqlite asyncpg aiomysql
+
+      - name: Run E2E tests
+        env:
+          E2E_TESTS_ENABLED: "true"
+          E2E_DATABASE_URL: "postgresql+asyncpg://test_user:test_password@localhost:5432/test_db"
+          DATABASE_URL: "postgresql+asyncpg://test_user:test_password@localhost:5432/test_db"
+          SECRET_KEY: "e2e-test-secret-key"
+          AUTH_ENABLED: "true"
+          JWT_AUTH_ENABLED: "true"
+          API_KEY_AUTH_ENABLED: "true"
+          API_KEYS: "test-api-key:read|write|admin"
+          AGENT_ENABLED: "true"
+          MULTIDB_ENABLED: "true"
+          CACHE_ENABLED: "false"
+        run: |
+          pytest tests/e2e/ -v --tb=short -m "e2e" --ignore=tests/e2e/test_performance_e2e.py
+
+      - name: Run E2E performance tests
+        env:
+          E2E_TESTS_ENABLED: "true"
+          E2E_DATABASE_URL: "postgresql+asyncpg://test_user:test_password@localhost:5432/test_db"
+          DATABASE_URL: "postgresql+asyncpg://test_user:test_password@localhost:5432/test_db"
+          SECRET_KEY: "e2e-test-secret-key"
+          AUTH_ENABLED: "true"
+          API_KEY_AUTH_ENABLED: "true"
+          API_KEYS: "test-api-key:read|write|admin"
+          MULTIDB_ENABLED: "true"
+          CACHE_ENABLED: "false"
+        run: |
+          pytest tests/e2e/test_performance_e2e.py -v --tb=short -m "e2e_performance"
+
   docker:
     name: Docker Build & Push
     runs-on: ubuntu-latest
-    needs: [lint, test]
+    needs: [lint, test, e2e-tests]
     if: github.event_name == 'push'
     permissions:
       contents: read