Cleaned up a load of relations and optional stuff

ref #11

src/models/entities/RunnerCard.ts

@@ -1,12 +1,12 @@
-import { Entity, PrimaryGeneratedColumn, Column, ManyToOne, OneToMany } from "typeorm";
 import {
   IsBoolean,
   IsEAN,
   IsInt,
   IsNotEmpty,
   IsOptional,
-  IsString,
+  IsString
 } from "class-validator";
+import { Column, Entity, ManyToOne, OneToMany, PrimaryGeneratedColumn } from "typeorm";
 import { Runner } from "./Runner";
 import { TrackScan } from "./TrackScan";
 
@@ -19,7 +19,6 @@ export class RunnerCard {
    * Autogenerated unique id (primary key).
    */
   @PrimaryGeneratedColumn()
-  @IsOptional()
   @IsInt()
   id: number;