clean: 불필요한 빌드 및 패키지 파일 정리

개발 환경의 빌드 산출물과 패키지 캐시 파일들을 저장소에서 제거하여
저장소 크기를 최적화하고 버전 관리에서 제외

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

portalApi/obj/Debug/.NETFramework,Version=v4.7.2.AssemblyAttributes.cs

@@ -1,4 +0,0 @@
-// <autogenerated />
-using System;
-using System.Reflection;
-[assembly: global::System.Runtime.Versioning.TargetFrameworkAttribute(".NETFramework,Version=v4.7.2", FrameworkDisplayName = ".NET Framework 4.7.2")]

portalApi/obj/Debug/portalApi.csproj.CoreCompileInputs.cache

@@ -1 +0,0 @@
-4744355cde88bd6037d5c4db27a51188125038e3

portalApi/obj/Debug/portalApi.csproj.FileListAbsolute.txt

@@ -1,31 +0,0 @@
-C:\Users\Administrator\Desktop\project\portalApi\bin\Debug\portalApi.exe.config
-C:\Users\Administrator\Desktop\project\portalApi\bin\Debug\portalApi.exe
-C:\Users\Administrator\Desktop\project\portalApi\bin\Debug\portalApi.pdb
-C:\Users\Administrator\Desktop\project\portalApi\obj\Debug\portalApi.csprojAssemblyReference.cache
-C:\Users\Administrator\Desktop\project\portalApi\obj\Debug\portalApi.Properties.Resources.resources
-C:\Users\Administrator\Desktop\project\portalApi\obj\Debug\portalApi.csproj.GenerateResource.cache
-C:\Users\Administrator\Desktop\project\portalApi\obj\Debug\portalApi.csproj.CoreCompileInputs.cache
-C:\Users\Administrator\Desktop\project\portalApi\obj\Debug\portalApi.exe
-C:\Users\Administrator\Desktop\project\portalApi\obj\Debug\portalApi.pdb
-C:\Users\Administrator\Desktop\project\portalApi\bin\Debug\Newtonsoft.Json.dll
-C:\Users\Administrator\Desktop\project\portalApi\bin\Debug\Newtonsoft.Json.xml
-C:\Users\Administrator\Desktop\project\portalApi\obj\Debug\portalApi.csproj.CopyComplete
-C:\Users\Administrator\Desktop\project\portalApi\bin\Debug\Microsoft.Bcl.AsyncInterfaces.dll
-C:\Users\Administrator\Desktop\project\portalApi\bin\Debug\System.Buffers.dll
-C:\Users\Administrator\Desktop\project\portalApi\bin\Debug\System.Memory.dll
-C:\Users\Administrator\Desktop\project\portalApi\bin\Debug\System.Numerics.Vectors.dll
-C:\Users\Administrator\Desktop\project\portalApi\bin\Debug\System.Runtime.CompilerServices.Unsafe.dll
-C:\Users\Administrator\Desktop\project\portalApi\bin\Debug\System.Text.Encodings.Web.dll
-C:\Users\Administrator\Desktop\project\portalApi\bin\Debug\System.Text.Json.dll
-C:\Users\Administrator\Desktop\project\portalApi\bin\Debug\System.Threading.Tasks.Extensions.dll
-C:\Users\Administrator\Desktop\project\portalApi\bin\Debug\System.ValueTuple.dll
-C:\Users\Administrator\Desktop\project\portalApi\bin\Debug\Microsoft.Bcl.AsyncInterfaces.xml
-C:\Users\Administrator\Desktop\project\portalApi\bin\Debug\System.Buffers.xml
-C:\Users\Administrator\Desktop\project\portalApi\bin\Debug\System.Memory.xml
-C:\Users\Administrator\Desktop\project\portalApi\bin\Debug\System.Numerics.Vectors.xml
-C:\Users\Administrator\Desktop\project\portalApi\bin\Debug\System.Runtime.CompilerServices.Unsafe.xml
-C:\Users\Administrator\Desktop\project\portalApi\bin\Debug\System.Text.Encodings.Web.xml
-C:\Users\Administrator\Desktop\project\portalApi\bin\Debug\System.Text.Json.xml
-C:\Users\Administrator\Desktop\project\portalApi\bin\Debug\System.Threading.Tasks.Extensions.xml
-C:\Users\Administrator\Desktop\project\portalApi\bin\Debug\System.ValueTuple.xml
-C:\Users\Administrator\Desktop\project\portalApi\obj\Debug\portalApi.Form1.resources