chore: 死代码与重复逻辑清理

删除未引用/未调用符号:
- PredictionRepository(无引用)
- is_correct_1x2(无调用者)
- LeagueOut(路由用 list[dict])
- IngestResponse(IngestBzzoiroResponse 已替代)
- SecurityCheckError(从未 raise,assert_security_on_startup 用 sys.exit)
- short_write(仅自引用,全仓库无外部调用)
- fetchIngestJobs(列表函数无页面使用,单数 fetchIngestJob 仍保留)
- clear_prompt_cache(无入口)

去重:
- eval._actual_1x2 改为委托 utils.actual_1x2(单一权威源)

全量测试 270 通过,业务行为不变。

frontend/src/admin/dal.ts

@@ -370,13 +370,6 @@ export function fetchIngestJob(jobId: string): Promise<IngestJob> {
   return api.get<IngestJob>(`${API_BASE}/admin/ingest/jobs/${jobId}`)
 }
 
-/**
- * 最近采集任务列表(最新在前)
- */
-export function fetchIngestJobs(limit = 20): Promise<IngestJob[]> {
-  return api.get<IngestJob[]>(`${API_BASE}/admin/ingest/jobs?limit=${limit}`)
-}
-
 /**
  * 比赛详情(含最近预测摘要)
  */

src/api/schemas.py

@@ -7,13 +7,6 @@ from typing import Any
 from pydantic import BaseModel, Field
 
 
-class LeagueOut(BaseModel):
-    id: int
-    code: str
-    name: str
-    country: str | None
-
-
 class MatchOut(BaseModel):
     id: int
     league_code: str | None
@@ -130,13 +123,6 @@ class TeamAliasOut(BaseModel):
     original_alias: str
 
 
-class IngestResponse(BaseModel):
-    leagues: dict
-    total_inserted: int
-    total_updated: int
-    errors: list[str] = []
-
-
 class IngestBzzoiroResponse(BaseModel):
     """POST /api/v1/ingest/bzzoiro 响应:兼容原 message 字段,新增 job_id 供轮询。"""
 

src/core/security_check.py

@@ -30,10 +30,6 @@ _MIN_SECRET_KEY_LEN = 16
 _WEAK_DB_PATTERNS = ("football:football@", "admin:admin@", "password@", "123456@")
 
 
-class SecurityCheckError(Exception):
-    """生产环境安全校验失败。"""
-
-
 async def _auth_configured() -> bool:
     """运行时鉴权是否已配置(含数据库密码哈希/.env 明文/API Key)。"""
     if await get_admin_password_hash():

src/db/base.py

@@ -68,25 +68,6 @@ async def short_read():
         yield session
 
 
-@asynccontextmanager
-async def short_write():
-    """短生命周期 write session: 提交后立即释放。
-
-    用法:
-        async with short_write() as session:
-            session.add(pred)
-            await session.commit()
-        # session 已关闭,连接已释放
-    """
-    async with AsyncSessionLocal() as session:
-        try:
-            yield session
-            await session.commit()
-        except Exception:
-            await session.rollback()
-            raise
-
-
 async def init_db() -> None:
     """验证数据库连接(不建表)。
 

src/db/repositories.py

@@ -215,17 +215,3 @@ class LeagueRepository:
     async def add(self, league: League) -> None:
         self._session.add(league)
         await self._session.flush()
-
-
-class PredictionRepository:
-    """预测记录数据访问。"""
-
-    def __init__(self, session: AsyncSession) -> None:
-        self._session = session
-
-    async def get_by_id(self, prediction_id: int) -> Prediction | None:
-        return await self._session.get(Prediction, prediction_id)
-
-    async def add(self, prediction: Prediction) -> None:
-        self._session.add(prediction)
-        await self._session.flush()

src/llm/eval.py

@@ -7,6 +7,7 @@ from sqlalchemy import func, or_, select
 
 from src.db.models import Prediction, Match, League
 from src.db.unit_of_work import get_uow
+from src.llm.utils import actual_1x2
 
 logger = logging.getLogger(__name__)
 
@@ -33,12 +34,8 @@ async def settle_prediction(prediction_id: int, home_goals: int, away_goals: int
 
 
 def _actual_1x2(home: int, away: int) -> str:
-    """根据实际比分返胜平负。"""
-    if home > away:
-        return "1"
-    if home == away:
-        return "X"
-    return "2"
+    """根据实际比分返胜平负(委托 utils.actual_1x2 单一权威源)。"""
+    return actual_1x2(home, away)
 
 
 def _build_filters(

src/llm/predict.py

@@ -172,20 +172,6 @@ async def _set_cached(match_id: int, provider: str, model: str, version: str, tp
     await _cache_backend.set(key, result, _CACHE_TTL_SEC)
 
 
-def clear_prompt_cache() -> None:
-    """清空 prompt 模板缓存(供开发/热更新时手动调用)。
-
-    lru_cache 的模板缓存是进程级的,改完 .md 需要重启进程才能生效;
-    提供显式清理入口,避免"改了模板却看不到变化"的困惑(见审查报告 P2-5)。
-    同时清空预测响应缓存(内存后端);Redis 后端因共享不清除。
-    """
-    _load_prompt_template.cache_clear()
-    if isinstance(_cache_backend, _MemoryCache):
-        _cache_backend._store.clear()
-    logger.info("prompt 模板缓存 + 预测响应缓存(内存)已清空")
-
-
-@functools.lru_cache(maxsize=8)
 def _load_prompt_template(version: str = "v1") -> str:
     """缓存 prompt 模板(进程生命周期内每个版本只读一次)。"""
     path = _PROMPT_DIR / f"match_prediction_{version}.md"

src/llm/utils.py

@@ -3,17 +3,9 @@ from __future__ import annotations
 
 
 def actual_1x2(home: int, away: int) -> str:
-    """实际比分 → 胜平负。
-
-    单一权威源: backtest.py 和 eval.py 共用,避免重复定义。
-    """
+    """实际比分 → 胜平负(单一权威源:backtest.py 与 eval.py 共用)。"""
     if home > away:
         return "1"
     if home == away:
         return "X"
     return "2"
-
-
-def is_correct_1x2(pred: str | None, actual: str) -> bool:
-    """预测是否命中胜平负。"""
-    return pred == actual