chore: standardize Python 3.13 runtime

pyproject.toml

@@ -7,7 +7,7 @@ name = "quant_engine"
 version = "0.1.0"
 description = "量化研究引擎 —— alpha 因子库 + 执行仿真 + 技术指标 + 数据适配 + 回测工具（v1.2.0 从 research_results 抽出）"
 readme = "README.md"
-requires-python = ">=3.11"
+requires-python = ">=3.13,<3.14"
 license = { text = "MIT" }
 authors = [
     { name = "researchhub team" },
@@ -39,7 +39,7 @@ where = ["src"]
 
 [tool.ruff]
 line-length = 100
-target-version = "py311"
+target-version = "py313"
 
 [tool.ruff.lint]
 select = ["E", "F", "W", "I", "N", "UP", "B", "A", "C4", "PT", "RUF"]
@@ -54,7 +54,7 @@ ignore = [
 ]
 
 [tool.mypy]
-python_version = "3.11"
+python_version = "3.13"
 strict = true
 ignore_missing_imports = true