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。

tests/test_review_required_fixes.py

@@ -17,6 +17,7 @@ import re
 
 import pytest
 
+from src.db.models import Team, TeamAlias
 from src.data.key_ring import _mask
 from src.llm import backtest as bt_mod
 from src.llm.agents import orchestrator as orch_mod
@@ -105,6 +106,15 @@ class _FakeDb:
         self.added: list = []
         self.flush_count = 0
         self._next_id = 1000
+        self._teams_by_id: dict[int, Team] = {}
+        self._aliases: dict[str, TeamAlias] = {}
+
+    async def get(self, cls, key):
+        if cls is Team:
+            return self._teams_by_id.get(key)
+        if cls is TeamAlias:
+            return self._aliases.get(key)
+        return None
 
     async def execute(self, _stmt):
         if self._results:
@@ -120,6 +130,10 @@ class _FakeDb:
             if getattr(obj, "id", None) is None:
                 self._next_id += 1
                 obj.id = self._next_id
+            if isinstance(obj, Team) and getattr(obj, "id", None) is not None:
+                self._teams_by_id[obj.id] = obj
+            if isinstance(obj, TeamAlias):
+                self._aliases[obj.alias_normalized] = obj
 
 
 async def test_r2_standings_actually_upserts(monkeypatch):