Fix ruff linting step to activate virtual environment before running checks

Author: Adit-999

.github/workflows/ci.yml

@@ -34,7 +34,9 @@ jobs:
           uv pip install -r requirements.txt
           uv pip install ruff
       - name: Lint with ruff
-        run: ruff check .
+        run: |
+          source .venv/bin/activate
+          ruff check .
 
   test:
     runs-on: ubuntu-latest