fix(server): /api/stacks does not handles primaryAssetId query param (#16868)

fix(server): add missing validation decorator

server/src/dtos/stack.dto.ts

@@ -12,6 +12,7 @@ export class StackCreateDto {
 }
 
 export class StackSearchDto {
+  @ValidateUUID({ optional: true })
   primaryAssetId?: string;
 }