Update CI to install from requirements.txt and fail on lint errors

.github/workflows/ci.yml

@@ -23,10 +23,10 @@ jobs:
           python-version: ${{ matrix.python-version }}
 
       - name: Install dependencies
-        run: pip install pytest
+        run: pip install -r requirements.txt
 
       - name: Run tests
-        run: pytest tests/ -v
+        run: pytest tests/ -v --tb=short
 
   lint:
     runs-on: ubuntu-latest
@@ -38,9 +38,8 @@ jobs:
         with:
           python-version: "3.12"
 
-      - name: Install ruff
-        run: pip install ruff
+      - name: Install dependencies
+        run: pip install -r requirements.txt
 
       - name: Run ruff
-        continue-on-error: true
         run: ruff check .