Add endpoint tests and Gitea workflow

.gitea/workflows/python.yml

@@ -0,0 +1,28 @@
+name: python
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt pytest httpx
+
+      - name: Compile checks
+        run: python -m compileall -q app tests
+
+      - name: Run tests
+        run: pytest -q