ci: run the example backend pytest suite on PRs and master

.github/workflows/example-backend-tests.yml

@@ -0,0 +1,27 @@
+name: Example Backend Tests
+
+on:
+  push:
+    branches:
+      - "master"
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@v7
+        with:
+          enable-cache: true
+          cache-dependency-glob: examples/app/backend/uv.lock
+
+      - name: Run example backend tests
+        working-directory: examples/app/backend
+        run: uv run --python 3.12 pytest tests/ -v

CHANGELOG.md

@@ -2,6 +2,9 @@
 
 ## 3.0.0-alpha.72
 
+### Added
+- **CI**: `.github/workflows/example-backend-tests.yml` runs the chat example backend's pytest suite (`examples/app/backend/tests`) on pull requests and pushes to `master`.
+
 ### Changed
 - **README**: package count corrected to 33 (lockstep TS + Python families, including TypeScript-only `webhook` and `events`).