refactor(factor): 完全重构因子计算框架 - 引入DSL表达式系统

- 删除旧因子框架：移除 base.py、composite.py、data_loader.py、data_spec.py
  及所有子模块（momentum、financial、quality、sentiment等）
- 新增DSL表达式系统：实现 factor DSL 编译器和翻译器
  - dsl.py: 领域特定语言定义
  - compiler.py: AST编译与优化
  - translator.py: Polars表达式翻译
  - api.py: 统一API接口
- 新增数据路由层：data_router.py 实现字段到表的动态路由
- 新增API封装：api_pro_bar.py 提供pro_bar数据接口
- 更新执行引擎：engine.py 适配新的DSL架构
- 重构测试体系：删除旧测试，新增 test_dsl_promotion.py、
  test_factor_integration.py、test_pro_bar.py
- 清理文档：删除8个过时文档（factor_design、db_sync_guide等）

src/data/storage.py

@@ -6,7 +6,7 @@ from pathlib import Path
 from typing import Optional, List, Dict, Any, Tuple
 from collections import defaultdict
 from datetime import datetime
-from src.data.config import get_config
+from src.config.settings import get_settings
 
 
 # Default column type mapping for automatic schema inference
@@ -53,7 +53,7 @@ class Storage:
         if hasattr(self, "_initialized"):
             return
 
-        cfg = get_config()
+        cfg = get_settings()
         self.base_path = path or cfg.data_path_resolved
         self.base_path.mkdir(parents=True, exist_ok=True)
         self.db_path = self.base_path / "prostock.db"
@@ -190,6 +190,26 @@ class Storage:
                 update_flag VARCHAR(1),
                 PRIMARY KEY (ts_code, end_date)
             )
+        
+        # Create pro_bar table for pro bar data (with adj, tor, vr)
+        self._connection.execute("""
+            CREATE TABLE IF NOT EXISTS pro_bar (
+                ts_code VARCHAR(16) NOT NULL,
+                trade_date DATE NOT NULL,
+                open DOUBLE,
+                high DOUBLE,
+                low DOUBLE,
+                close DOUBLE,
+                pre_close DOUBLE,
+                change DOUBLE,
+                pct_chg DOUBLE,
+                vol DOUBLE,
+                amount DOUBLE,
+                tor DOUBLE,
+                vr DOUBLE,
+                adj_factor DOUBLE,
+                PRIMARY KEY (ts_code, trade_date)
+            )
         """)
         
         # Create index for financial_income