fix: minor issues from code review

(M1) DTO: @IsObject({ each: true }) on dimensions array
(M2) audit log: add missing tenantId in submitAnswer
(M3) console.log -> this.logger in controller + service

server/src/assessment/dto/create-template.dto.ts

@@ -8,6 +8,7 @@ import {
   Max,
   IsObject,
   IsBoolean,
+  IsNumber,
 } from 'class-validator';
 
 export class CreateTemplateDto {
@@ -60,6 +61,7 @@ export class CreateTemplateDto {
   linkedGroupIds?: string[];
 
   @IsArray()
+  @IsObject({ each: true })
   @IsOptional()
   dimensions?: Array<{ name: string; label: string; weight: number }>;