docs: 统一文档与代码一致性

- 修复所有 confidence → subjective_confidence 残留(03-api, 04-agents, 05-data, 07-development)
- 修复 5 张表 → 6 张表残留(06-deployment)
- 同步 API schema 示例与实际模型一致
- 更新 predictions 表结构文档(新增 status/cutoff/input_hash 字段)

code: 修复 API 异常处理(eval/predict)和 context_builder stats 时间过滤

src/api/routes/predict.py

@@ -1,6 +1,8 @@
 """预测路由。"""
 from __future__ import annotations
 
+import logging
+
 from fastapi import APIRouter, Depends, HTTPException, Query
 from sqlalchemy import select
 from sqlalchemy.orm import selectinload
@@ -10,6 +12,8 @@ from src.db.base import AsyncSession, get_db, get_db_read
 from src.db.models import Prediction
 from src.llm.predict import predict_match, PredictResult
 
+logger = logging.getLogger(__name__)
+
 router = APIRouter(prefix="/api/v1", tags=["predict"])
 
 
@@ -24,9 +28,14 @@ async def predict(req: PredictRequest, db: AsyncSession = Depends(get_db)):
             mode=req.mode,
         )
     except ValueError as e:
-        raise HTTPException(404, str(e))
+        logger.warning("predict validation error: %s", e)
+        raise HTTPException(404, "比赛不存在")
     except RuntimeError as e:
-        raise HTTPException(502, str(e))
+        logger.error("predict LLM error: %s", e)
+        raise HTTPException(502, "LLM 预测失败,请查看服务器日志")
+    except Exception as e:
+        logger.exception("predict unexpected error")
+        raise HTTPException(500, "预测失败,请查看服务器日志")
 
     # single / multi 两种结果统一映射
     return PredictOut(