refactor: align codebase with EventCrew domain and trim legacy band stack

- Update API: events, users, policies, routes, resources, migrations
- Remove deprecated models/resources (customers, setlists, invitations, etc.)
- Refresh admin app and docs; remove apps/band

Made-with: Cursor

docker-compose.yml

@@ -1,4 +1,4 @@
-# Band Management - Development Services
+# Event Crew - Development Services
 # PHP/Node run natively for best Cursor IDE performance
 
 services:
@@ -9,8 +9,8 @@ services:
       - "3306:3306"
     environment:
       MYSQL_ROOT_PASSWORD: root
-      MYSQL_DATABASE: band_management
-      MYSQL_USER: band_management
+      MYSQL_DATABASE: event_crew
+      MYSQL_USER: event_crew
       MYSQL_PASSWORD: secret
     volumes:
       - mysql_data:/var/lib/mysql