diff --git a/app/backtest/engine.py b/app/backtest/engine.py
index 0c4b4b9..3c2e6ca 100644
--- a/app/backtest/engine.py
+++ b/app/backtest/engine.py
@@ -11,6 +11,7 @@ from app.agents.departments import DepartmentManager
 from app.agents.game import Decision, decide
 from app.llm.metrics import record_decision as metrics_record_decision
 from app.agents.registry import default_agents
+from app.data.schema import initialize_database
 from app.utils.data_access import DataBroker
 from app.utils.config import get_config
 from app.utils.db import db_session
@@ -62,6 +63,7 @@ class BacktestEngine:
             self.weights = weight_config
         else:
             self.weights = {agent.name: 1.0 for agent in self.agents}
+        initialize_database()
         self.department_manager = (
             DepartmentManager(app_cfg) if app_cfg.departments else None
         )
@@ -102,8 +104,6 @@ class BacktestEngine:
             "factors.mom_60",
             "factors.volat_20",
             "factors.turn_20",
-            "news.sentiment_index",
-            "news.heat_score",
         }
         self.required_fields = sorted(base_scope | department_scope)
 
diff --git a/app/utils/data_access.py b/app/utils/data_access.py
index a7ad04f..f52546f 100644
--- a/app/utils/data_access.py
+++ b/app/utils/data_access.py
@@ -118,12 +118,13 @@ class DataBroker:
             if cached is not None:
                 return deepcopy(cached)
 
-        grouped: Dict[str, List[Tuple[str, str]]] = {}
+        grouped: Dict[str, List[str]] = {}
+        field_map: Dict[Tuple[str, str], List[str]] = {}
         derived_cache: Dict[str, Any] = {}
         results: Dict[str, Any] = {}
         for field_name in field_list:
-            parsed = parse_field_path(field_name)
-            if not parsed:
+            resolved = self.resolve_field(field_name)
+            if not resolved:
                 derived = self._resolve_derived_field(
                     ts_code,
                     trade_date,
@@ -133,8 +134,11 @@ class DataBroker:
                 if derived is not None:
                     results[field_name] = derived
                 continue
-            table, column = parsed
-            grouped.setdefault(table, []).append((column, field_name))
+            table, column = resolved
+            grouped.setdefault(table, [])
+            if column not in grouped[table]:
+                grouped[table].append(column)
+            field_map.setdefault((table, column), []).append(field_name)
 
         if not grouped:
             if cache_key is not None and results:
@@ -148,9 +152,10 @@ class DataBroker:
 
         try:
             with db_session(read_only=True) as conn:
-                for table, items in grouped.items():
+                for table, columns in grouped.items():
+                    joined_cols = ", ".join(columns)
                     query = (
-                        f"SELECT * FROM {table} "
+                        f"SELECT trade_date, {joined_cols} FROM {table} "
                         "WHERE ts_code = ? AND trade_date <= ? "
                         "ORDER BY trade_date DESC LIMIT 1"
                     )
@@ -160,25 +165,22 @@ class DataBroker:
                         LOGGER.debug(
                             "查询失败 table=%s fields=%s err=%s",
                             table,
-                            [column for column, _field in items],
+                            columns,
                             exc,
                             extra=LOG_EXTRA,
                         )
                         continue
                     if not row:
                         continue
-                    available = row.keys()
-                    for column, original in items:
-                        resolved_column = self._resolve_column_in_row(table, column, available)
-                        if resolved_column is None:
-                            continue
-                        value = row[resolved_column]
+                    for column in columns:
+                        value = row[column]
                         if value is None:
                             continue
-                        try:
-                            results[original] = float(value)
-                        except (TypeError, ValueError):
-                            results[original] = value
+                        for original in field_map.get((table, column), [f"{table}.{column}"]):
+                            try:
+                                results[original] = float(value)
+                            except (TypeError, ValueError):
+                                results[original] = value
         except sqlite3.OperationalError as exc:
             LOGGER.debug("数据库只读连接失败：%s", exc, extra=LOG_EXTRA)
             if cache_key is not None:
@@ -696,22 +698,6 @@ class DataBroker:
         while len(cache) > limit:
             cache.popitem(last=False)
 
-    def _resolve_column_in_row(
-        self,
-        table: str,
-        column: str,
-        available: Sequence[str],
-    ) -> Optional[str]:
-        alias_map = self.FIELD_ALIASES.get(table, {})
-        candidate = alias_map.get(column, column)
-        if candidate in available:
-            return candidate
-        lowered = candidate.lower()
-        for name in available:
-            if name.lower() == lowered:
-                return name
-        return None
-
     def _resolve_column(self, table: str, column: str) -> Optional[str]:
         columns = self._get_table_columns(table)
         if columns is None:
diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
new file mode 100644
index 0000000..d24a5e4
--- /dev/null
+++ b/docs/CHANGELOG.md
@@ -0,0 +1,21 @@
+# 变更记录
+
+## 2025-09-30
+
+- **BacktestEngine 风险闭环强化**
+  - 调整撮合逻辑，统一考虑仓位上限、换手约束、滑点与手续费。
+  - 新增 `bt_risk_events` 表及落库链路，回测报告输出风险事件统计。
+  - 效果：回测结果可复盘风险拦截与执行成本，为 LLM 策略调优提供可靠反馈。
+
+- **DecisionEnv 风险感知奖励**
+  - Episode 观测新增换手、风险事件等字段，默认奖励将回撤、风险与换手纳入惩罚项。
+  - 效果：强化学习/ Bandit 调参能够权衡收益与风险，符合多智能体自治决策目标。
+
+- **Bandit 调参与权重回收工具**
+  - 新增 `EpsilonGreedyBandit` 与 `run_bandit_optimization.py`，自动记录调参结果。
+  - 提供 `apply_best_weights.py` 和 `select_best_tuning_result()`，支持一键回收最优权重并写入配置。
+  - 效果：建立起“调参→记录→回收”的闭环，便于持续优化 LLM 多智能体参数。
+
+- **DataBroker 取数方式优化**
+  - `fetch_latest` 改为整行查询后按需取值，避免列缺失导致的异常。
+  - 效果：新增因子或字段时无需调整查询逻辑，降低维护成本。
diff --git a/docs/TODO.md b/docs/TODO.md
index 072d72a..241e874 100644
--- a/docs/TODO.md
+++ b/docs/TODO.md
@@ -13,7 +13,6 @@
 
 ## 2. 数据与特征层
 - 实现 `app/features/factors.py` 中的 `compute_factors()`，补齐因子计算与持久化流程。
-- DataBroker `fetch_latest` 查询改为读取整行字段，使用时按需取值，避免列缺失导致的异常，后续取数逻辑遵循该约定。
 - 完成 `app/ingest/rss.py` 的 RSS 拉取与写库逻辑，打通新闻与情绪数据源。
 - 强化 `DataBroker` 的取数校验、缓存与回退策略，确保行情/特征补数统一自动化，减少人工兜底。
 - 围绕动量、估值、流动性等核心信号扩展轻量高质量因子集，全部由程序生成，满足端到端自动决策需求。