pull and install torchstore in CI (#122)

* pull and install torchstore in CI

* prepend `python -m`

* fix

* Update unit_test.yaml

Author: casteryh

.github/workflows/unit_test.yaml

@@ -27,6 +27,11 @@ jobs:
         run: python -m pip install torch==2.9.0.dev20250826 --extra-index-url https://download.pytorch.org/whl/nightly/cpu
       - name: Install monarch
         run: python -m pip install monarch-no-torch==0.1.0.dev20250826 --find-links assets/ci
+      - name: Install torchstore
+        run: |
+          eval "$(ssh-agent -s)"
+          ssh-add - <<< '${{ secrets.FORGE_GITHUB_CI_FOR_TORCHSTORE }}'
+          python -m pip install git+ssh://[email protected]/meta-pytorch/torchstore.git
       - name: Install dependencies
         run: python -m pip install --no-build-isolation -e ".[dev]"
       - name: Run unit tests with coverage