```

build(go): 升级 Go 版本至 1.20 并更新依赖包

将项目 Go 版本从 1.18 升级至 1.20，并同步更新了相关模块依赖。
同时替换 decimal 库为 alpacadecimal，以提升数值计算精度和性能。

- 升级 Go 模块版本
- 替换 github.com/govalues/decimal 为 github.com/alpacahq/alpacadecimal
- 更新多个间接依赖包版本
- 调整相关代码中 decimal

logic/go.sum

@@ -1,5 +1,7 @@
 github.com/BurntSushi/toml v1.4.0 h1:kuoIxZQy2WRRk1pttg9asf+WVv6tWQuBNVmK8+nqPr0=
 github.com/BurntSushi/toml v1.4.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
+github.com/alpacahq/alpacadecimal v0.0.8 h1:DZlC1dfZT7dX9ljDmayVVlIvYb3ljglQd/Xq64aetDk=
+github.com/alpacahq/alpacadecimal v0.0.8/go.mod h1:RGlrk0IdAzlsqnONx7wnfvhO5g/9parrcU3HELvbfSI=
 github.com/antlabs/stl v0.0.2 h1:sna1AXR5yIkNE9lWhCcKbheFJSVfCa3vugnGyakI79s=
 github.com/antlabs/stl v0.0.2/go.mod h1:kKrO4xrn9cfS1mJVo+/BqePZjAYMXqD0amGF2Ouq7ac=
 github.com/antlabs/timer v0.1.4 h1:MHdE00MDnNfhJCmqSOdLXs35uGNwfkMwfbynxrGmQ1c=
@@ -46,8 +48,6 @@ github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/gorilla/websocket v1.5.1 h1:gmztn0JnHVt9JZquRuzLw3g4wouNVzKL15iLr/zn/QY=
 github.com/gorilla/websocket v1.5.1/go.mod h1:x3kM2JMyaluk02fnUJpQuwD2dCS5NDG2ZHL0uE0tcaY=
 github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
-github.com/govalues/decimal v0.1.2 h1:cHGR2FBD3M0zPY88CUqdtfqAcd4JHpug7u4nFe375Gs=
-github.com/govalues/decimal v0.1.2/go.mod h1:NfqNdX/GQBotCdmXtzckjhq54itVCX1Git3psSgom8A=
 github.com/grokify/html-strip-tags-go v0.1.0 h1:03UrQLjAny8xci+R+qjCce/MYnpNXCtgzltlQbOBae4=
 github.com/grokify/html-strip-tags-go v0.1.0/go.mod h1:ZdzgfHEzAfz9X6Xe5eBLVblWIxXfYSQ40S/VKrAOGpc=
 github.com/jinzhu/copier v0.4.0 h1:w3ciUoD19shMCRargcpm0cm91ytaBhDvuRpz1ODO/U8=
@@ -94,6 +94,8 @@ github.com/rogpeppe/go-internal v1.11.0 h1:cWPaGQEPrBb5/AsnsZesgZZ9yb1OQ+GOISoDN
 github.com/rogpeppe/go-internal v1.11.0/go.mod h1:ddIwULY96R17DhadqLgMfk9H9tvdUzkipdSkR5nkCZA=
 github.com/samber/lo v1.52.0 h1:Rvi+3BFHES3A8meP33VPAxiBZX/Aws5RxrschYGjomw=
 github.com/samber/lo v1.52.0/go.mod h1:4+MXEGsJzbKGaUEQFKBq2xtfuznW9oz/WrgyzMzRoM0=
+github.com/shopspring/decimal v1.3.1 h1:2Usl1nmF/WZucqkFZhnfFYxxxu8LG21F6nPQBE5gKV8=
+github.com/shopspring/decimal v1.3.1/go.mod h1:DKyhrW/HYNuLGql+MJL6WCR6knT2jwCFRcu2hWCYk4o=
 github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
 github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
 github.com/tnnmigga/enum v1.0.2 h1:Yvchx0Esc01X5HiphW78sKzH/RXKttdFsfPO1ARiOa4=