feat: 新增文档源和技能管理相关功能

1. 新增文档源管理模块（documentSource）
   - 控制器：documentSourceController.py
   - DAO层：documentSourceDao.py
   - 模型：documentSourceModel.py
   - 服务层：documentSourceService.py

2. 新增技能管理模块（skill）
   - 控制器：skillController.py
   - DAO层：skillDao.py
   - 模型：skillModel.py
   - 服务层：skillService.py

3. 新增AI服务（aiService.py）

4. 新增配置文件
   - AI配置：config/ai_config.py
   - 技能配置：config/skills/test-case-generator/

5. 新增SQL脚本
   - 文档权限：add_document_permissions.sql
   - 模块状态字段：add_module_status_field.sql
   - 文档源表：create_document_source_table.sql
   - 技能规则：skills_rules_pgsql.sql

app/api/dao/documentSourceDao.py

@@ -0,0 +1,75 @@
+# encoding: UTF-8
+from sqlalchemy import func
+
+from ..model.documentSourceModel import DocumentSource
+
+
+class DocumentSourceDao:
+    
+    @staticmethod
+    def create(session, document_source):
+        session.add(document_source)
+        session.flush()
+        return document_source.id
+    
+    @staticmethod
+    def get_by_id(session, document_id):
+        return session.query(DocumentSource).filter(
+            DocumentSource.id == document_id,
+            DocumentSource.is_delete == 0
+        ).first()
+    
+    @staticmethod
+    def get_by_source(session, source):
+        return session.query(DocumentSource).filter(
+            DocumentSource.source == source,
+            DocumentSource.is_delete == 0
+        ).first()
+    
+    @staticmethod
+    def list_by_filters(session, filters, page_no=1, page_size=20, order_by=None):
+        query = session.query(DocumentSource).filter(*filters)
+        
+        if order_by is not None:
+            query = query.order_by(order_by)
+        
+        total = query.count()
+        
+        items = query.offset((page_no - 1) * page_size).limit(page_size).all()
+        
+        return items, total
+    
+    @staticmethod
+    def update_by_id(session, document_id, update_info):
+        result = session.query(DocumentSource).filter(
+            DocumentSource.id == document_id,
+            DocumentSource.is_delete == 0
+        ).update(update_info)
+        session.flush()
+        return result
+    
+    @staticmethod
+    def delete_by_id(session, document_id):
+        return session.query(DocumentSource).filter(
+            DocumentSource.id == document_id,
+            DocumentSource.is_delete == 0
+        ).update({'is_delete': 1})
+    
+    @staticmethod
+    def get_latest_version(session, product_id, project_id, source):
+        return session.query(DocumentSource).filter(
+            DocumentSource.product_id == product_id,
+            DocumentSource.project_id == project_id,
+            DocumentSource.source == source,
+            DocumentSource.is_delete == 0
+        ).order_by(DocumentSource.version.desc()).first()
+    
+    @staticmethod
+    def get_max_version(session, product_id, project_id, source):
+        result = session.query(func.max(DocumentSource.version)).filter(
+            DocumentSource.product_id == product_id,
+            DocumentSource.project_id == project_id,
+            DocumentSource.source == source,
+            DocumentSource.is_delete == 0
+        ).scalar()
+        return result if result else 0