Install the specification package in CI

Author: TonisOrmisson

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
         uses: actions/checkout@v7
         with: &specification-checkout
           repository: OpenStatSpec/specification
-          ref: 79339ec3d8f8aa81789b7e85f6b8afa6f1374e50
+          ref: agent/dolt-declaration-validator
           path: openstatspec-specification
       - name: Checkout required SPSS engine
         uses: actions/checkout@v7
@@ -32,6 +32,7 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
       - run: python -m pip install --upgrade pip
+      - run: python -m pip install ./openstatspec-specification
       - run: python -m pip install ./openstatspec-pyspssio
       - run: python -m pip install -e ".[dev]"
       - run: python -m pytest -m "not services"
@@ -53,6 +54,7 @@ jobs:
       - run: python -m pip install --upgrade pip build
       - run: python -m build
       - run: python -m venv /tmp/openstatspec-wheel-smoke
+      - run: /tmp/openstatspec-wheel-smoke/bin/python -m pip install ./openstatspec-specification
       - run: /tmp/openstatspec-wheel-smoke/bin/python -m pip install ./openstatspec-pyspssio
       - run: /tmp/openstatspec-wheel-smoke/bin/python -m pip install dist/*.whl
       - run: /tmp/openstatspec-wheel-smoke/bin/openstatspec capabilities
@@ -90,6 +92,7 @@ jobs:
         with:
           python-version: "3.12"
       - run: python -m pip install --upgrade pip
+      - run: python -m pip install ./openstatspec-specification
       - run: python -m pip install ./openstatspec-pyspssio
       - run: python -m pip install -e ".[dev,sql]"
       - run: python -m pytest -m services
@@ -192,6 +195,7 @@ jobs:
             --workdir /var/lib/dolt \
             "$OPENSTATSPEC_DOLT_IMAGE" sql-server -H 0.0.0.0 -l warning
       - run: python -m pip install --upgrade pip
+      - run: python -m pip install ./openstatspec-specification
       - run: python -m pip install ./openstatspec-pyspssio
       - run: python -m pip install -e ".[dev,sql]"
       - name: Wait for Dolt