workflows/package-tests: activate venv when necessary

Author: airwoodix

.github/workflows/tests.yml

@@ -51,9 +51,11 @@ jobs:
         run: |
           pip install uv
           uv venv
+          # FIXME: https://github.com/astral-sh/uv/issues/1386
           echo "VIRTUAL_ENV=.venv" >> $GITHUB_ENV
       - name: Check Python version
         run: |
+          # FIXME: https://github.com/astral-sh/uv/issues/1910
           source $VIRTUAL_ENV/bin/activate
           python --version
       - name: Restore packages
@@ -74,6 +76,8 @@ jobs:
           sparse-checkout-cone-mode: false
       - name: Run examples
         run: |
+          # FIXME: https://github.com/astral-sh/uv/issues/1910
+          source $VIRTUAL_ENV/bin/activate
           ./examples/run_all.sh
   # tests:
   #   name: tests-py${{ matrix.python-version }}-qiskit${{ matrix.qiskit-version }}-resolve-${{ matrix.resolution-strategy }}