ci: install complete build dependencies

Author: shuhao

.github/workflows/build.yml

@@ -30,7 +30,7 @@ jobs:
       - name: Install Python dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install build wheel "setuptools>=64"
+          pip install build wheel "setuptools>=64" "cmake>=3.14" "pybind11>=2.10.0"
           pip install torch==2.5.1 --index-url https://download.pytorch.org/whl/cpu
           pip install "numpy>=1.20.0"
           pip install pytest pytest-cov
@@ -76,7 +76,7 @@ jobs:
 
       - name: Validate explicit CUDA switch
         run: |
-          pip install pytest
+          pip install pytest numpy
           pytest \
             tests/test_issue5_cuda_cpu_switch_cleanup.py \
             tests/test_issue6_build_matrix_and_perf_baseline.py::test_issue6_setup_has_explicit_cuda_cpu_switch_contract