fix(P1-G/H/I/K): 运行时配置解密/Redis JSON/eval summary/UPSERT

P1-G runtime_config:DB 故障回落 env;解密失败在生产环境抛出(ValueError),
  非生产回落;DB 异常与解密异常不再共用 except Exception。
P1-H Redis 预测缓存:去掉 pickle 改用 JSON + dataclasses.asdict,
  datetime 字段 ISO 序列化。
P1-I eval get_eval_summary:默认 limit=None(不冒充全集);新增 run_type(默认 live)
  与 season 过滤;_build_filters 同步扩展。
P1-K Team/League get_or_create:INSERT 改为 PG UPSERT(ON CONFLICT DO NOTHING)
  防并发重复插入。

测试 test_p1_g_runtime_config(4/4) + test_p1_k_upsert(4/4);全量绿。

tests/test_p1_k_upsert.py

@@ -0,0 +1,77 @@
+"""P1-K 回归测试: Team/League get_or_create 使用 PG UPSERT(ON CONFLICT DO NOTHING)。
+
+运行: pytest tests/test_p1_k_upsert.py -v
+(依赖真实 PG;无 PG 时跳过。)
+"""
+from __future__ import annotations
+
+import pytest
+from sqlalchemy.ext.asyncio import AsyncSession, create_async_engine
+from sqlalchemy.orm import sessionmaker
+
+from src.core.config import settings
+from src.db.models import League, Team
+from src.db.repositories import LeagueRepository, TeamRepository
+
+
+def _make_engine():
+    url = settings.DATABASE_URL
+    return create_async_engine(url, pool_size=1, max_overflow=0, pool_pre_ping=True)
+
+
+async def _can_connect() -> bool:
+    try:
+        eng = _make_engine()
+        async with eng.begin() as conn:
+            pass
+        await eng.dispose()
+        return True
+    except Exception:
+        return False
+
+
+@pytest.fixture(autouse=True)
+def _skip_without_pg():
+    import asyncio
+
+    if not asyncio.run(_can_connect()):
+        pytest.skip("无真实 PG 可用,跳过 P1-K 测试")
+
+
+class TestUpsertBehavior:
+    @pytest.fixture
+    async def db(self):
+        eng = _make_engine()
+        SessionLocal = sessionmaker(eng, class_=AsyncSession, expire_on_commit=False)
+        async with SessionLocal() as session:
+            yield session
+        await eng.dispose()
+
+    @pytest.mark.asyncio
+    async def test_league_get_or_create_inserts_new(self, db):
+        repo = LeagueRepository(db)
+        league = await repo.get_or_create("TST", "Test League", "X")
+        assert league.id is not None
+        assert league.code == "TST"
+
+    @pytest.mark.asyncio
+    async def test_league_get_or_create_idempotent(self, db):
+        """P1-K: 重复调用返回同一行,不创建重复。"""
+        repo = LeagueRepository(db)
+        a = await repo.get_or_create("IDP", "Idempotent", "X")
+        b = await repo.get_or_create("IDP", "Idempotent", "X")
+        assert a.id == b.id, "重复调用应返回同一行"
+
+    @pytest.mark.asyncio
+    async def test_team_get_or_create_inserts_new(self, db):
+        repo = TeamRepository(db)
+        team = await repo.get_or_create("Unique Team FC_k1")
+        assert team.id is not None
+
+    @pytest.mark.asyncio
+    async def test_team_get_or_create_idempotent(self, db):
+        """P1-K: 重复调用返回同一行(UPSERT 防并发重复)。"""
+        repo = TeamRepository(db)
+        a = await repo.get_or_create("Same Team_k1")
+        b = await repo.get_or_create("Same Team_k1")
+        assert a.id == b.id, "重复调用应返回同一行"