fix: MudBlazor v8 compatibility, static asset conflict, deploy host domain

- fix CS0542: rename Users/Assets private members to _users/_assets
- fix CS0246: MudDialogInstance -> IMudDialogInstance
- fix AppTheme: PaletteLight/PaletteDark, string[] FontFamily, string typography values
- fix DataCollectionMonitoring: @(ticker.DataPointCount)개 Korean char parsing
- fix SchedulerService: add missing Hangfire namespaces, fix GetJobStatus return type
- fix Program.cs: move PostgreSQL setup above Hangfire registration
- fix ConfirmDialog: BackdropClick, Canceled spelling for MudBlazor v8
- fix static asset conflict: remove wwwroot/_framework from git tracking
- chore: add wwwroot/_framework/ to .gitignore
- ci: change DEPLOY_HOST from IP to quant.taxbaik.com domain

.gitignore

@@ -17,6 +17,9 @@ publish-output/
 *.user
 *.suo
 
+# Blazor WASM 클라이언트 정적 자산 (빌드 시 자동 복사, 커밋 불필요)
+src/dotnet/QuantEngine.Web/wwwroot/_framework/
+
 # 런타임 감사 로그 (append-only, 매 DAG 실행마다 증가)
 runtime/lineage_events.jsonl