feat: WTM 멀티프로젝트 플랫폼 구축 (BE + FE 전체 구현)

Phase 0: wbx-spring-core 라이브러리 전환
- java-library 플러그인, WbxAutoConfiguration, Admin 조건부 활성화
- 루트 settings.gradle + build.gradle (멀티모듈)

Phase 1: wtm-api 모듈 생성
- 23개 JPA Entity, 14개 Controller, 79개 API 엔드포인트
- Flyway V100~V107 MySQL 마이그레이션
- TimesheetRuleEngine, TimesheetApprovalHandler, P6WbsParser

Phase 2: wtm-frontend (Vue 3 + PrimeVue 4)
- 10개 도메인 모듈, 17개 View, 5개 서브컴포넌트
- 반응형 레이아웃 (AppLayout, AppSidebar, AppTopbar)
- BaseCrudTable, BaseFormDialog, BasePageHeader 표준 컴포넌트
- JWT 인터셉터, 역할 기반 메뉴 필터링

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

wbx-spring-core/build/resources/main/application-mysql.yml

@@ -0,0 +1,22 @@
+# ===== MySQL 프로필 =====
+# 사용법: --spring.profiles.active=prod,mysql
+
+spring:
+  datasource:
+    url: jdbc:mysql://${DB_HOST:ws.ubuilder.co.kr}:${DB_PORT:3306}/${DB_NAME:mos}?useUnicode=true&characterEncoding=UTF-8&useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=Asia/Seoul
+    username: ${DB_USER:jsh}
+    password: ${DB_PASS:jsh@}
+    driver-class-name: com.mysql.cj.jdbc.Driver
+    hikari:
+      maximum-pool-size: ${DB_POOL_SIZE:20}
+      minimum-idle: 5
+      connection-timeout: 30000
+
+  jpa:
+    database-platform: org.hibernate.dialect.MySQLDialect
+    properties:
+      hibernate:
+        dialect: org.hibernate.dialect.MySQLDialect
+
+  flyway:
+    locations: classpath:db/migration/common,classpath:db/migration/mysql