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

app.py

@@ -15,13 +15,9 @@ def create_app(config_class=Config):
     # 初始化擴展
     db.init_app(app)
 
-    # 註冊 Blueprint (後續擴展)
-    # from routes.auth import auth_bp
-    # from routes.admin import admin_bp
-    # from routes.api import api_bp
-    # app.register_blueprint(auth_bp)
-    # app.register_blueprint(admin_bp)
-    # app.register_blueprint(api_bp)
+    # 註冊 Blueprint
+    from routes.api import api_bp
+    app.register_blueprint(api_bp)
 
     # 健康檢查端點
     @app.route('/health')