docs(phase2): Stage 2 (KIS API 포팅) 완료 상태 문서화

**이 커밋 기준 현황:**

Phase 1: Web UI 마이그레이션 ✅ COMPLETE
- MudBlazor → Fluent UI v5 (RC) 완전 전환
- 모든 페이지 마이그레이션 완료 (0% MudBlazor 잔존)

Phase 2: KIS API 및 데이터 수집 파이프라인 🔄 IN PROGRESS
✅ 완료된 작업:
- KisApiClient: 5가지 quotation 메서드 (읽기 전용)
- 보안: AssertReadOnly enforcement (trading API 차단)
- PostgreSQL: TokenCache, CollectionRepository 구현
- Web API: 6가지 Collection 엔드포인트
- Blazor UI: Collection.razor 대시보드 완성
- Build: 0 에러 (6개 RC 경고는 패키지 RC 버전 이슈)

📋 진행 중:
- Collection 엔드포인트 통합 테스트
- Python subprocess 임시 연계 (Phase 2 단계별 구현)

**CLAUDE.md 업데이트 내용:**
- Phase 1~3 상태 요약
- KIS API 보안 정책 문서화
- Collection API 엔드포인트 명세
- 개발 커맨드 추가 (Phase 2 테스팅 가이드)

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

src/dotnet/QuantEngine.Application/obj/Release/net10.0/.NETCoreApp,Version=v10.0.AssemblyAttributes.cs

@@ -0,0 +1,4 @@
+// <autogenerated />
+using System;
+using System.Reflection;
+[assembly: global::System.Runtime.Versioning.TargetFrameworkAttribute(".NETCoreApp,Version=v10.0", FrameworkDisplayName = ".NET 10.0")]

src/dotnet/QuantEngine.Application/obj/Release/net10.0/QuantEngine.Application.AssemblyInfo.cs

@@ -0,0 +1,22 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+using System;
+using System.Reflection;
+
+[assembly: System.Reflection.AssemblyCompanyAttribute("QuantEngine.Application")]
+[assembly: System.Reflection.AssemblyConfigurationAttribute("Release")]
+[assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+c5e6a013f40060315f33535da0c1f8af21134d52")]
+[assembly: System.Reflection.AssemblyProductAttribute("QuantEngine.Application")]
+[assembly: System.Reflection.AssemblyTitleAttribute("QuantEngine.Application")]
+[assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]
+
+// Generated by the MSBuild WriteCodeFragment class.
+

src/dotnet/QuantEngine.Application/obj/Release/net10.0/QuantEngine.Application.AssemblyInfoInputs.cache

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src/dotnet/QuantEngine.Application/obj/Release/net10.0/QuantEngine.Application.GeneratedMSBuildEditorConfig.editorconfig

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+is_global = true
+build_property.TargetFramework = net10.0
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+build_property.TargetFrameworkVersion = v10.0
+build_property.TargetPlatformMinVersion = 
+build_property.UsingMicrosoftNETSdkWeb = 
+build_property.ProjectTypeGuids = 
+build_property.InvariantGlobalization = 
+build_property.PlatformNeutralAssembly = 
+build_property.EnforceExtendedAnalyzerRules = 
+build_property.EntryPointFilePath = 
+build_property._SupportedPlatformList = Linux,macOS,Windows
+build_property.RootNamespace = QuantEngine.Application
+build_property.ProjectDir = C:\Temp\data_feed\src\dotnet\QuantEngine.Application\
+build_property.EnableComHosting = 
+build_property.EnableGeneratedComInterfaceComImportInterop = 
+build_property.EffectiveAnalysisLevelStyle = 10.0
+build_property.EnableCodeStyleSeverity = 

src/dotnet/QuantEngine.Application/obj/Release/net10.0/QuantEngine.Application.GlobalUsings.g.cs

@@ -0,0 +1,8 @@
+// <auto-generated/>
+global using System;
+global using System.Collections.Generic;
+global using System.IO;
+global using System.Linq;
+global using System.Net.Http;
+global using System.Threading;
+global using System.Threading.Tasks;

src/dotnet/QuantEngine.Application/obj/Release/net10.0/QuantEngine.Application.csproj.CoreCompileInputs.cache

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+50a1a17d0b66d4e2aad7ae33d2c42deb772d97115767c08cf92bc6f6c8ee49ee

src/dotnet/QuantEngine.Application/obj/Release/net10.0/QuantEngine.Application.csproj.FileListAbsolute.txt

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+C:\Temp\data_feed\src\dotnet\QuantEngine.Application\obj\Release\net10.0\QuantEngine.Application.AssemblyInfo.cs
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+C:\Temp\data_feed\src\dotnet\QuantEngine.Application\obj\Release\net10.0\QuantEng.294596D8.Up2Date
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