fix: 补充 Alembic 迁移 + bzzoiro 批量优化 + validation 兼容层

- 新增 0004_snapshot_and_constraints.py: 重命名 confidence → subjective_confidence,
  新增 cutoff_at/input_hash, 添加 CHECK 约束
- bzzoiro.py: 预加载完整 Match 对象到内存,更新路径不再重复查询
- validation.py: 旧字段 confidence 兼容并打 deprecation 日志

src/llm/validation.py

@@ -4,8 +4,12 @@
 """
 from __future__ import annotations
 
+import logging
+
 from pydantic import BaseModel, Field, field_validator, model_validator
 
+logger = logging.getLogger(__name__)
+
 
 class AgentReportSchema(BaseModel):
     """单个专家 Agent 输出的校验 schema。"""
@@ -92,11 +96,17 @@ def validate_agent_output(raw: dict) -> AgentReportSchema:
 
 def validate_prediction_output(raw: dict) -> PredictionOutputSchema:
     """校验最终预测输出。"""
+    # 优先新字段,旧字段仅兼容并打日志
+    conf = raw.get("subjective_confidence")
+    if conf is None and "confidence" in raw:
+        logger.warning("Deprecated field 'confidence' used, prefer 'subjective_confidence'")
+        conf = raw["confidence"]
+
     return PredictionOutputSchema(
         pred_home_goals=float(raw.get("pred_home_goals", 0)),
         pred_away_goals=float(raw.get("pred_away_goals", 0)),
         pred_1x2=raw.get("1x2") or raw.get("pred_1x2", "X"),
-        subjective_confidence=float(raw.get("confidence", 0.5)),
+        subjective_confidence=float(conf if conf is not None else 0.5),
         reasoning=str(raw.get("reasoning", ""))[:1000],
     )