feat: DITAnalyzer module - Feature 6.2 & 6.3 implementation

- DITAnalyzer class with data preprocessing
- Feature 6.2: High value resource allocation analysis
- Feature 6.3: Stagnant deal alerts
- Flask API routes for CSV upload and analysis
- Test suite with sample data

requirements.txt

@@ -5,3 +5,6 @@ python-dotenv>=1.0.0
 pymysql>=1.1.0
 cryptography>=41.0.0
 requests>=2.31.0
+pandas>=2.0.0
+numpy>=1.24.0
+werkzeug>=3.0.0