feat: Add monitor grouping functionality to backend

- Add optional 'group' field to Monitor schema with trimming and validation
- Add group validation to Joi schemas for create and edit monitor endpoints
- Add GET /api/v1/monitors/team/groups endpoint to fetch unique groups
- Implement case-insensitive group filtering in database layer
- Support for organizing monitors into collapsible groups

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

server/src/service/v1/business/monitorService.js

@@ -267,6 +267,11 @@ class MonitorService {
 	getAllGames = () => {
 		return this.games;
 	};
+
+	getGroupsByTeamId = async ({ teamId }) => {
+		const groups = await this.db.monitorModule.getGroupsByTeamId({ teamId });
+		return groups;
+	};
 }
 
 export default MonitorService;