Add Gitea Actions CI (lint + tests)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

.gitea/workflows/ci.yml

@@ -0,0 +1,22 @@
+name: CI
+on:
+  push:
+    branches: [master]
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+      - name: Install
+        run: pip install -e '.[dev]'
+      - name: Lint
+        run: ruff check gogo tests scripts
+      - name: Tests
+        # SQLite-backed suite — no services needed; real-LLM acceptance tests
+        # self-skip without an API key
+        run: pytest -q --timeout=120