feat: 球队实体一致性 — 归一化咽喉 + team_aliases 别名机制

events/standings 创建 Team 前均经 team_names.normalize(已有,确认),
TeamRepository.get_or_create 收敛为归一化唯一咽喉 + info 日志。

新增 team_aliases 表(NFKD 归一别名 → teams.id FK CASCADE),
定位三步链:normalize(name) → teams.name → team_aliases → insert。
不自动合并历史重复队;提供 POST /api/v1/admin/teams/aliases 显式添加。

迁移 0020_team_aliases + Admin 别名管理端点(admin_teams.py)。
全量测试 270 通过。

src/api/routes/admin_settings.py

@@ -15,11 +15,15 @@ from fastapi import APIRouter
 
 from src.api.routes.admin_config import router as admin_config_router
 from src.api.routes.admin_datasources import router as admin_datasources_router
+from src.api.routes.admin_ingest_jobs import router as admin_ingest_jobs_router
 from src.api.routes.admin_llm import router as admin_llm_router
 from src.api.routes.admin_quality import router as admin_quality_router
+from src.api.routes.admin_teams import router as admin_teams_router
 
 router = APIRouter()
 router.include_router(admin_datasources_router)
 router.include_router(admin_config_router)
+router.include_router(admin_ingest_jobs_router)
 router.include_router(admin_llm_router)
 router.include_router(admin_quality_router)
+router.include_router(admin_teams_router)

src/api/routes/admin_teams.py

@@ -0,0 +1,60 @@
+"""后台管理:球队别名管理(只读列表 + 添加别名)。
+
+归一名(teams.name)是球队唯一键;别名(team_aliases)是同一球队的不同写法
+(大小写/译名/缩写)到归一后 teams.id 的映射。入库时 normalize(name) 依次查
+teams.name 与 team_aliases,命中即复用,避免重复 Team。
+
+不自动合并历史重复队;需显式添加别名(或先 SQL/再经由此接口)。
+"""
+from __future__ import annotations
+
+import logging
+
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy import desc, select
+
+from src.api.deps import require_admin
+from src.api.schemas import TeamAliasIn, TeamAliasOut
+from src.db.base import AsyncSession, get_db_read
+from src.db.models import Team, TeamAlias
+from src.db.repositories import TeamRepository
+
+logger = logging.getLogger(__name__)
+
+router = APIRouter(prefix="/api/v1/admin", tags=["admin"], dependencies=[Depends(require_admin)])
+
+
+@router.get("/teams/aliases", response_model=list[TeamAliasOut])
+async def list_team_aliases(db: AsyncSession = Depends(get_db_read)):
+    """列出所有球队别名(最新在前)。"""
+    rows = (await db.execute(select(TeamAlias).order_by(desc(TeamAlias.created_at)).limit(200))).scalars().all()
+    return [
+        TeamAliasOut(
+            alias_normalized=r.alias_normalized,
+            team_id=r.team_id,
+            original_alias=r.original_alias,
+        )
+        for r in rows
+    ]
+
+
+@router.post("/teams/aliases", response_model=TeamAliasOut, status_code=201)
+async def add_team_alias(req: TeamAliasIn, db: AsyncSession = Depends(get_db_read)):
+    """为已有 Team 添加别名(幂等:重复添加会更新指向)。
+
+    不自动合并历史重复队。若需合并 A→B:先为 A 的归一名添加别名指向 B,
+    再人工确认 A 是否仍有独立引用。
+    """
+    # 校验目标 Team 存在
+    team = await db.get(Team, req.team_id)
+    if team is None:
+        raise HTTPException(404, f"目标 Team 不存在: id={req.team_id}")
+
+    repo = TeamRepository(db)
+    row = await repo.add_alias(req.alias, req.team_id)
+    logger.info("添加 Team 别名: %s -> team_id=%s", req.alias, req.team_id)
+    return TeamAliasOut(
+        alias_normalized=row.alias_normalized,
+        team_id=row.team_id,
+        original_alias=row.original_alias,
+    )