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.example

@@ -3,6 +3,7 @@ DB_USER=eee_admin
 DB_PASSWORD=eee_password
 DB_NAME=eee_dashboard
 DB_PORT=5432
+# Docker compose 기본값과 동일 (data/postgres 에 영구 저장)
 DATABASE_URL="postgresql://eee_admin:eee_password@localhost:5432/eee_dashboard"
 
 # ─── Backend ─────────────────────────────────────────────────