chore(did-manager): fix DTO params

apps/did-manager/src/dids/dto/register-from-seed.dto.ts

 import { ApiProperty } from '@nestjs/swagger';
-import { IsString, IsArray } from 'class-validator';
+import { IsString, IsArray, IsOptional } from 'class-validator';
 
 export class RegisterFromSeedPayload {
   @IsString()
@@ -10,6 +10,7 @@ export class RegisterFromSeedPayload {
   public seed: string;
 
   @IsArray()
+  @IsOptional()
   @ApiProperty({
     description: 'Services to associate with DID',
     example: [