feat: DbUp 마이그레이션 및 Razor Pages 어드민 UI 완성 (Phase 1-3)

## Summary
- ✅ DbUp 기반 SQL 마이그레이션 시스템 구현
  * V1: 기본 스키마 및 테이블 (quantengine, kis_tokens, workspace_account 등)
  * V2: KIS 데이터 수집 테이블 (kis_collection_runs, kis_collection_snapshots, kis_collection_errors)
  * V3: 엔진 히스토리 스키마 (market_raw_history, factor_version_history 등)
  * V4: 초기 관리자 계정 생성

- ✅ Razor Pages 어드민 UI 완성
  * Users: Create, Edit 페이지 + Deactivate 기능
  * Collection: Errors, Snapshots 상세 페이지
  * Monitoring: 실시간 모니터링 대시보드
  * Operations: 작업 관리 및 스케줄 상태 조회

- ✅ E2E 테스트 업데이트
  * login.spec.ts: Blazor WASM → Razor Pages 기반 로그인 테스트 (3개 통과)
  * admin-pages.spec.ts: 관리자 페이지 플로우 테스트 신규 작성

- ✅ 보안 업그레이드
  * Newtonsoft.Json 13.0.3 (GHSA-5crp-9r3c-p9vr 취약성 해결)
  * BCrypt 비밀번호 해싱 (SHA-256 자동 마이그레이션)

## Build Status
- 빌드: 성공 (0 errors, 1 warning - Newtonsoft.Json)
- 마이그레이션: 성공 (원격 서버 검증됨)
- E2E 테스트: 3개 통과 (DB 의존 3개는 로컬 환경 제약)

## Remote Verification
원격 서버 (Hetzner 178.104.200.7)에서:
- 2026-07-11 17:04:23.474: Database migration and initialization successful
- Hangfire SQL objects 설치됨
- 애플리케이션 정상 실행 중

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

src/dotnet/QuantEngine.Infrastructure/Migrations/V1__Initial_Schema.sql

@@ -0,0 +1,149 @@
+-- V1__Initial_Schema.sql
+-- Create quantengine schema and core tables
+
+CREATE SCHEMA IF NOT EXISTS quantengine;
+
+-- KIS API Token Cache
+CREATE TABLE IF NOT EXISTS quantengine.kis_tokens (
+    account TEXT PRIMARY KEY,
+    access_token TEXT NOT NULL,
+    expires_at TEXT NOT NULL,
+    updated_at TEXT NOT NULL
+);
+
+-- User Account Management
+CREATE TABLE IF NOT EXISTS quantengine.workspace_account (
+    ordinal INT NOT NULL,
+    username TEXT PRIMARY KEY,
+    password_hash TEXT NOT NULL,
+    role TEXT NOT NULL DEFAULT 'Admin',
+    is_active TEXT NOT NULL DEFAULT 'true',
+    created_at TEXT NOT NULL,
+    updated_at TEXT NOT NULL
+);
+
+CREATE INDEX IF NOT EXISTS idx_workspace_account_active ON quantengine.workspace_account(is_active, username);
+
+-- Session Management
+CREATE TABLE IF NOT EXISTS quantengine.workspace_session (
+    session_token_hash TEXT PRIMARY KEY,
+    username TEXT NOT NULL,
+    role TEXT NOT NULL DEFAULT 'Admin',
+    created_at TEXT NOT NULL,
+    expires_at TEXT NOT NULL,
+    revoked_at TEXT
+);
+
+CREATE INDEX IF NOT EXISTS idx_workspace_session_username ON quantengine.workspace_session(username, expires_at DESC);
+
+-- Collection Runs
+CREATE TABLE IF NOT EXISTS quantengine.collection_runs (
+    run_id TEXT PRIMARY KEY,
+    collector_name TEXT NOT NULL,
+    started_at TEXT NOT NULL,
+    finished_at TEXT,
+    status TEXT NOT NULL,
+    input_source TEXT,
+    output_json_path TEXT,
+    output_db_path TEXT,
+    notes TEXT,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+-- Collection Snapshots
+CREATE TABLE IF NOT EXISTS quantengine.collection_snapshots (
+    run_id TEXT NOT NULL,
+    dataset_name TEXT NOT NULL,
+    ticker TEXT NOT NULL,
+    name TEXT,
+    sector TEXT,
+    as_of_date TEXT,
+    source_priority TEXT,
+    source_status TEXT,
+    payload_json TEXT NOT NULL,
+    provenance_json TEXT NOT NULL,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    PRIMARY KEY (run_id, dataset_name, ticker)
+);
+
+CREATE INDEX IF NOT EXISTS idx_collection_snapshots_ticker_time ON quantengine.collection_snapshots(ticker, created_at DESC);
+
+-- Collection Source Errors
+CREATE TABLE IF NOT EXISTS quantengine.collection_source_errors (
+    run_id TEXT NOT NULL,
+    ticker TEXT,
+    source_name TEXT NOT NULL,
+    error_kind TEXT NOT NULL,
+    error_message TEXT NOT NULL,
+    payload_json TEXT,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE INDEX IF NOT EXISTS idx_collection_source_errors_run ON quantengine.collection_source_errors(run_id, source_name);
+
+-- Settings
+CREATE TABLE IF NOT EXISTS quantengine.settings (
+    ordinal INT NOT NULL,
+    key TEXT PRIMARY KEY,
+    value_json TEXT NOT NULL,
+    note TEXT NOT NULL DEFAULT '',
+    updated_at TEXT NOT NULL
+);
+
+-- Account Snapshots
+CREATE TABLE IF NOT EXISTS quantengine.account_snapshot (
+    ordinal INT NOT NULL,
+    row_json TEXT NOT NULL,
+    captured_at TEXT NOT NULL DEFAULT '',
+    account TEXT NOT NULL DEFAULT '',
+    account_type TEXT NOT NULL DEFAULT '',
+    ticker TEXT NOT NULL DEFAULT '',
+    name TEXT NOT NULL DEFAULT '',
+    parse_status TEXT NOT NULL DEFAULT '',
+    user_confirmed TEXT NOT NULL DEFAULT '',
+    updated_at TEXT NOT NULL
+);
+
+CREATE INDEX IF NOT EXISTS idx_account_snapshot_captured_at ON quantengine.account_snapshot(captured_at);
+CREATE INDEX IF NOT EXISTS idx_account_snapshot_ticker ON quantengine.account_snapshot(ticker);
+
+-- Workspace Metadata
+CREATE TABLE IF NOT EXISTS quantengine.workspace_meta (
+    key TEXT PRIMARY KEY,
+    value_json TEXT NOT NULL
+);
+
+-- Workspace Change Log
+CREATE TABLE IF NOT EXISTS quantengine.workspace_change_log (
+    id SERIAL PRIMARY KEY,
+    domain TEXT NOT NULL,
+    action TEXT NOT NULL,
+    target_ref TEXT NOT NULL DEFAULT '',
+    actor TEXT NOT NULL DEFAULT 'system',
+    note TEXT NOT NULL DEFAULT '',
+    before_json TEXT NOT NULL DEFAULT 'null',
+    after_json TEXT NOT NULL DEFAULT 'null',
+    created_at TEXT NOT NULL
+);
+
+-- Workspace Approval
+CREATE TABLE IF NOT EXISTS quantengine.workspace_approval_v2 (
+    domain TEXT NOT NULL,
+    target_ref TEXT NOT NULL DEFAULT '*',
+    status TEXT NOT NULL,
+    approved_by TEXT NOT NULL DEFAULT '',
+    approved_at TEXT NOT NULL DEFAULT '',
+    note TEXT NOT NULL DEFAULT '',
+    updated_at TEXT NOT NULL,
+    PRIMARY KEY (domain, target_ref)
+);
+
+-- Workspace Lock
+CREATE TABLE IF NOT EXISTS quantengine.workspace_lock (
+    domain TEXT NOT NULL,
+    target_ref TEXT NOT NULL DEFAULT '',
+    locked_by TEXT NOT NULL DEFAULT '',
+    reason TEXT NOT NULL DEFAULT '',
+    locked_at TEXT NOT NULL,
+    PRIMARY KEY (domain, target_ref)
+);