feat(contents): add updateAdmin method to contents service

- Introduced `updateAdmin` logic to handle admin-specific content updates.
- Included cache clearing upon successful update for data consistency.

backend/src/contents/contents.service.ts

@@ -184,6 +184,16 @@ export class ContentsService {
 		return deleted;
 	}
 
+	async updateAdmin(id: string, data: any) {
+		this.logger.log(`Updating content ${id} by admin`);
+		const updated = await this.contentsRepository.update(id, data);
+
+		if (updated) {
+			await this.clearContentsCache();
+		}
+		return updated;
+	}
+
 	async findOne(idOrSlug: string, userId?: string) {
 		const content = await this.contentsRepository.findOne(idOrSlug, userId);
 		if (!content) return null;