fix: resolve Python 3.8 compatibility issues

- Create separate requirements-py38.txt for Python 3.8 compatibility
- Use numpy>=1.21.0,<1.25.0 for Python 3.8 (numpy 1.26.4 requires Python 3.9+)
- Use pandas>=1.5.0,<2.1.0 for Python 3.8 compatibility
- Update Python 3.8 workflow to use Python 3.8 compatible requirements
- Update cache key to reference correct requirements file

Author: Neverdecel

.github/workflows/python38-compat.yml

@@ -0,0 +1,49 @@
+name: Python 3.8 Compatibility
+
+on:
+  push:
+    branches: [ main, master, develop ]
+  pull_request:
+    branches: [ main, master, develop ]
+
+jobs:
+  python38-compatibility:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    
+    - name: Set up Python 3.8
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.8'
+        
+    - name: Cache pip dependencies
+      uses: actions/cache@v4
+      with:
+        path: ~/.cache/pip
+        key: ${{ runner.os }}-pip-3.8-${{ hashFiles('**/requirements-py38.txt') }}
+        restore-keys: |
+          ${{ runner.os }}-pip-3.8-
+        
+    - name: Install dependencies (Python 3.8)
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r requirements-py38.txt
+    
+    - name: Test Import Structure (Python 3.8)
+      run: |
+        python -c "import coderag.config; print('✓ Config import successful on Python 3.8')"
+        python -c "import coderag.embeddings; print('✓ Embeddings import successful on Python 3.8')"
+        python -c "import coderag.index; print('✓ Index import successful on Python 3.8')"
+        python -c "import coderag.search; print('✓ Search import successful on Python 3.8')"
+        python -c "import coderag.monitor; print('✓ Monitor import successful on Python 3.8')"
+      env:
+        OPENAI_API_KEY: dummy-key-for-testing
+        
+    - name: Syntax Check (Python 3.8)
+      run: |
+        python -m py_compile main.py
+        python -m py_compile app.py
+        python -m py_compile prompt_flow.py
+        find coderag/ -name "*.py" -exec python -m py_compile {} \;

requirements-py38.txt

@@ -0,0 +1,57 @@
+altair==5.4.1
+annotated-types==0.7.0
+anyio==4.4.0
+attrs==24.2.0
+blinker==1.8.2
+cachetools==5.5.0
+certifi==2024.8.30
+charset-normalizer==3.3.2
+click==8.1.7
+colorama==0.4.6
+distro==1.9.0
+exceptiongroup==1.2.2
+faiss-cpu==1.8.0.post1
+gitdb==4.0.11
+GitPython==3.1.43
+h11==0.14.0
+httpcore==1.0.5
+httpx==0.27.2
+idna==3.8
+Jinja2==3.1.4
+jiter==0.5.0
+jsonschema==4.23.0
+jsonschema-specifications==2023.12.1
+markdown-it-py==3.0.0
+MarkupSafe==2.1.5
+mdurl==0.1.2
+narwhals==1.6.2
+numpy>=1.21.0,<1.25.0
+openai==1.44.0
+packaging==24.1
+pandas>=1.5.0,<2.1.0
+pillow==10.4.0
+protobuf==5.28.0
+pyarrow==17.0.0
+pydantic==2.9.0
+pydantic_core==2.23.2
+pydeck==0.9.1
+Pygments==2.18.0
+python-dateutil==2.9.0.post0
+python-dotenv==1.0.1
+pytz==2024.1
+referencing==0.35.1
+requests==2.32.3
+rich==13.8.0
+rpds-py==0.20.0
+six==1.16.0
+smmap==5.0.1
+sniffio==1.3.1
+streamlit==1.38.0
+tenacity==8.5.0
+toml==0.10.2
+tornado==6.4.1
+tqdm==4.66.5
+typing_extensions==4.12.2
+tzdata==2024.1
+urllib3==2.2.2
+watchdog==4.0.2