feat: team org panel, admin CRUD, local deploy tools, bidirectional data sync

Add TeamMember model and APIs, team status UI, /admin page, local server bats,
and scripts to sync data between local PostgreSQL and Render.

Co-authored-by: Cursor <cursoragent@cursor.com>

.env.docker.example

@@ -0,0 +1,12 @@
+# Docker Compose 사용 시 (선택)
+# 1. Windows PostgreSQL 서비스 중지 (5432 포트 충돌 방지)
+# 2. backend\.env 의 DATABASE_URL 을 아래로 변경
+# 3. docker compose up -d
+
+DB_USER=eee_admin
+DB_PASSWORD=eee_password
+DB_NAME=eee_dashboard
+DB_PORT=5432
+
+# backend\.env:
+# DATABASE_URL="postgresql://eee_admin:eee_password@localhost:5432/eee_dashboard"