fix(ci): mypy python_version 3.10 → 3.12 修复 numpy stub 语法错误

根因：CI 的 mypy job 在 Python 3.13 下运行，安装的 numpy 2.x stub
使用 PEP 695 type 语句（3.12+ 语法），但 pyproject.toml 的
python_version="3.10" 让 mypy 按 3.10 语义解析，报
'Type statement is only supported in Python 3.12 and greater'。

修复：
- python_version 提升到 3.12（CI mypy job 实际跑 3.13，开发目标版本对齐）
- mypy/ruff 同步排除 gitignored 的 exchange_margin.py 本地脚本
- 顺带修复 market.py / test_screen.py 的 ruff format 漂移

pyproject.toml

@@ -23,7 +23,9 @@ packages = ["src/easy_tdx"]
 
 [tool.mypy]
 strict = true
-python_version = "3.10"
+python_version = "3.12"
+# 跳过未跟踪的本地脚本（依赖外部 unified_config/sqlalchemy/requests，不属于库）
+exclude = ["src/easy_tdx/exchange_margin\\.py"]
 
 [[tool.mypy.overrides]]
 module = ["pandas", "tabulate", "matplotlib", "matplotlib.*"]
@@ -44,7 +46,7 @@ ignore_missing_imports = true
 [tool.ruff]
 target-version = "py310"
 line-length = 100
-extend-exclude = ["*.pyi"]
+extend-exclude = ["*.pyi", "src/easy_tdx/exchange_margin.py"]
 
 [tool.ruff.lint]
 select = ["E", "F", "I", "UP"]

src/easy_tdx/web/routers/market.py

@@ -145,9 +145,7 @@ async def market_strength(
     # 注：在协程内用 get_running_loop() 而非 get_event_loop()，
     # 后者在 Python 3.12+ 已弃用。
     loop = asyncio.get_running_loop()
-    results = await loop.run_in_executor(
-        None, lambda: ranker.rank(universe=universe, top_n=top_n)
-    )
+    results = await loop.run_in_executor(None, lambda: ranker.rank(universe=universe, top_n=top_n))
 
     records = [
         {

tests/unit/test_screen.py

@@ -681,9 +681,7 @@ class TestStrengthRankerInit:
         from easy_tdx.screen.strength import StrengthRanker
 
         with patch("easy_tdx.screen.strength.resolve_vipdoc", return_value=Path("/fake")):
-            ranker = StrengthRanker(
-                preset="steady", w5=0.5, w20=0.3, w60=0.2, vol_adjusted=False
-            )
+            ranker = StrengthRanker(preset="steady", w5=0.5, w20=0.3, w60=0.2, vol_adjusted=False)
         assert ranker._w5 == 0.5
         assert ranker._w20 == 0.3
         assert ranker._w60 == 0.2
@@ -695,4 +693,3 @@ class TestStrengthRankerInit:
         with patch("easy_tdx.screen.strength.resolve_vipdoc", return_value=Path("/fake")):
             ranker = StrengthRanker(preset="breakout")
         assert ranker.preset == "breakout"
-