need ddtrace dep for source code integration

Author: tschaume

.github/workflows/upgrade-dependencies.yml

@@ -30,7 +30,7 @@ jobs:
       - name: Upgrade Python dependencies
         shell: bash
         run: |
-          python${{ matrix.python-version }} -m pip install --upgrade pip "pip-tools<7.5"
+          python${{ matrix.python-version }} -m pip install --upgrade pip "pip-tools<7.5" ddtrace
           cd ${{ matrix.package }}
           python${{ matrix.python-version }} -m piptools compile -q --upgrade --resolver=backtracking -o requirements/${{ matrix.os }}_py${{ matrix.python-version }}.txt
           python${{ matrix.python-version }} -m piptools compile -q --upgrade --resolver=backtracking --all-extras -o requirements/${{ matrix.os }}_py${{ matrix.python-version }}_extras.txt