CI: Add --prefer-binary, --no-cache-dir, --force-reinstall flags and single test reproduction step

.github/workflows/ci.yml

@@ -48,11 +48,18 @@ jobs:
         pip cache purge || true
         # Use binary wheels to avoid build issues with Python 3.12+
         # numpy>=1.26.0 required for Python 3.12 support
-        pip install --only-binary=:all: numpy scipy
-        python -m pip install pytest pytest-cov
-        python -m pip install -r requirements.txt
+        # Force reinstall numpy/scipy with --prefer-binary and --no-cache-dir to avoid ABI mismatches
+        pip install --prefer-binary --no-cache-dir --force-reinstall --only-binary=:all: numpy scipy
+        python -m pip install --prefer-binary --no-cache-dir pytest pytest-cov
+        python -m pip install --prefer-binary --no-cache-dir -r requirements.txt
         # If segfaults persist, consider switching to conda-forge for numpy/scipy.
 
+    - name: Run single test for reproduction
+      run: |
+        # Run a single test first to verify the environment is working
+        python -X faulthandler -m pytest tests/test_audio_processor.py::TestEqualizerBand::test_initialization -v
+      continue-on-error: false
+
     - name: Run tests
       run: |
         python -X faulthandler -m pytest tests/ -v --maxfail=1 --cov=python-equalizer --cov-report=xml --cov-report=term
@@ -83,8 +90,8 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip setuptools wheel
-        pip install black flake8 pylint mypy isort
-        pip install --only-binary=:all: numpy scipy PyQt5
+        pip install --prefer-binary --no-cache-dir black flake8 pylint mypy isort
+        pip install --prefer-binary --no-cache-dir --only-binary=:all: numpy scipy PyQt5
 
     - name: Check code formatting with Black
       run: |
@@ -127,7 +134,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip setuptools wheel
-        pip install --only-binary=:all: numpy scipy PyQt5
+        pip install --prefer-binary --no-cache-dir --only-binary=:all: numpy scipy PyQt5
 
     - name: Run examples
       run: |