fix: move null check before metadata parse in setDefaultConferencingApp (calcom#29457) (calcom#29466)

teamMetadataSchema.parse(team?.metadata) was called before checking
if team exists, causing a Zod validation error on undefined instead
of the intended NotFoundException. Also corrected the misleading
error message from 'user not found' to 'team not found'.

Co-authored-by: Pranav Gawande <pranavv00@users.noreply.github.com>
Co-authored-by: Bandhan Majumder <133476557+bandhan-majumder@users.noreply.github.com>

Author: pranavv00

apps/api/v2/src/modules/teams/teams/teams.repository.ts

@@ -89,12 +89,13 @@ export class TeamsRepository {
 
   async setDefaultConferencingApp(teamId: number, appSlug?: string, appLink?: string) {
     const team = await this.getById(teamId);
-    const teamMetadata = teamMetadataSchema.parse(team?.metadata);
 
     if (!team) {
-      throw new NotFoundException("user not found");
+      throw new NotFoundException("team not found");
     }
 
+    const teamMetadata = teamMetadataSchema.parse(team.metadata);
+
     return await this.dbWrite.prisma.team.update({
       data: {
         metadata: