fix(ci): install package editable before pytest

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: sickkick

.github/workflows/validate.yml

@@ -19,5 +19,6 @@ jobs:
           python -m pip install --upgrade pip
           pip install pytest
           pip install -r requirements.txt
+          pip install -e .
       - name: Run tests
         run: pytest -q