ci: add memory leak detection workflow

.gitea/workflows/ci.yml

@@ -110,3 +110,25 @@ jobs:
           pytest tests/ --cov=app --cov-report=term-missing --cov-fail-under=70 || \
             echo "::warning::Coverage below 70%"
         continue-on-error: true
+
+  memory:
+    name: Memory Leak Check
+    runs-on: ubuntu-latest
+    needs: [lint]
+    container:
+      image: python:3.11-slim
+
+    steps:
+      - name: Setup and checkout
+        run: |
+          apt-get update -qq && apt-get install -yqq --no-install-recommends git >/dev/null
+          git clone --depth 1 --branch "${GITHUB_REF_NAME}" \
+            "https://oauth2:${{ github.token }}@${GITHUB_SERVER_URL#https://}/${GITHUB_REPOSITORY}.git" .
+
+      - name: Install dependencies
+        run: |
+          pip install -q -r requirements.txt
+          pip install -q pytest
+
+      - name: Run memory leak tests
+        run: pytest tests/test_memory.py -v --tb=short