chore: 添加虚拟环境到仓库

- 添加 backend_service/venv 虚拟环境
- 包含所有Python依赖包
- 注意：虚拟环境约393MB，包含12655个文件

backend_service/venv/lib/python3.13/site-packages/pypika/analytics.py

@@ -0,0 +1,122 @@
+"""
+Package for SQL analytic functions wrappers
+"""
+from pypika.terms import (
+    AnalyticFunction,
+    WindowFrameAnalyticFunction,
+    IgnoreNullsAnalyticFunction,
+)
+
+__author__ = "Timothy Heys"
+__email__ = "theys@kayak.com"
+
+
+class Preceding(WindowFrameAnalyticFunction.Edge):
+    modifier = "PRECEDING"
+
+
+class Following(WindowFrameAnalyticFunction.Edge):
+    modifier = "FOLLOWING"
+
+
+CURRENT_ROW = "CURRENT ROW"
+
+
+class Rank(AnalyticFunction):
+    def __init__(self, **kwargs):
+        super(Rank, self).__init__("RANK", **kwargs)
+
+
+class DenseRank(AnalyticFunction):
+    def __init__(self, **kwargs):
+        super(DenseRank, self).__init__("DENSE_RANK", **kwargs)
+
+
+class RowNumber(AnalyticFunction):
+    def __init__(self, **kwargs):
+        super(RowNumber, self).__init__("ROW_NUMBER", **kwargs)
+
+
+class NTile(AnalyticFunction):
+    def __init__(self, term, **kwargs):
+        super(NTile, self).__init__("NTILE", term, **kwargs)
+
+
+class FirstValue(WindowFrameAnalyticFunction, IgnoreNullsAnalyticFunction):
+    def __init__(self, *terms, **kwargs):
+        super(FirstValue, self).__init__("FIRST_VALUE", *terms, **kwargs)
+
+
+class LastValue(WindowFrameAnalyticFunction, IgnoreNullsAnalyticFunction):
+    def __init__(self, *terms, **kwargs):
+        super(LastValue, self).__init__("LAST_VALUE", *terms, **kwargs)
+
+
+class Median(AnalyticFunction):
+    def __init__(self, term, **kwargs):
+        super(Median, self).__init__("MEDIAN", term, **kwargs)
+
+
+class Avg(WindowFrameAnalyticFunction):
+    def __init__(self, term, **kwargs):
+        super(Avg, self).__init__("AVG", term, **kwargs)
+
+
+class StdDev(WindowFrameAnalyticFunction):
+    def __init__(self, term, **kwargs):
+        super(StdDev, self).__init__("STDDEV", term, **kwargs)
+
+
+class StdDevPop(WindowFrameAnalyticFunction):
+    def __init__(self, term, **kwargs):
+        super(StdDevPop, self).__init__("STDDEV_POP", term, **kwargs)
+
+
+class StdDevSamp(WindowFrameAnalyticFunction):
+    def __init__(self, term, **kwargs):
+        super(StdDevSamp, self).__init__("STDDEV_SAMP", term, **kwargs)
+
+
+class Variance(WindowFrameAnalyticFunction):
+    def __init__(self, term, **kwargs):
+        super(Variance, self).__init__("VARIANCE", term, **kwargs)
+
+
+class VarPop(WindowFrameAnalyticFunction):
+    def __init__(self, term, **kwargs):
+        super(VarPop, self).__init__("VAR_POP", term, **kwargs)
+
+
+class VarSamp(WindowFrameAnalyticFunction):
+    def __init__(self, term, **kwargs):
+        super(VarSamp, self).__init__("VAR_SAMP", term, **kwargs)
+
+
+class Count(WindowFrameAnalyticFunction):
+    def __init__(self, term, **kwargs):
+        super(Count, self).__init__("COUNT", term, **kwargs)
+
+
+class Sum(WindowFrameAnalyticFunction):
+    def __init__(self, term, **kwargs):
+        super(Sum, self).__init__("SUM", term, **kwargs)
+
+
+class Max(WindowFrameAnalyticFunction):
+    def __init__(self, term, **kwargs):
+        super(Max, self).__init__("MAX", term, **kwargs)
+
+
+class Min(WindowFrameAnalyticFunction):
+    def __init__(self, term, **kwargs):
+        super(Min, self).__init__("MIN", term, **kwargs)
+
+
+class Lag(AnalyticFunction):
+    def __init__(self, *args, **kwargs):
+        super(Lag, self).__init__("LAG", *args, **kwargs)
+
+
+class Lead(AnalyticFunction):
+    def __init__(self, *args, **kwargs):
+        super(Lead, self).__init__("LEAD", *args, **kwargs)