fix: add explicit JoinClumn to MediaRequest media relation

Fixes intermittent NULL mediaId foreign key on media_request records byadding explicit @JoinColumn
decorator to the media relation. Without this,TypeORM's implicit FK mapping was unreliable, causing
orphaned requeststhat would crash the frontend when accessing user profiles. Also removes the
redundant @Column decorator for mediaId which conflicted withthe relation, and removes explicit
mediaId assignments in the constructorwhich are now handled correctly by TypeORM through the
relation.

server/entity/MediaRequest.ts

@@ -21,6 +21,7 @@ import {
   AfterUpdate,
   Column,
   Entity,
+  JoinColumn,
   ManyToOne,
   OneToMany,
   PrimaryGeneratedColumn,
@@ -519,6 +520,7 @@ export class MediaRequest {
     eager: true,
     onDelete: 'CASCADE',
   })
+  @JoinColumn({ name: 'mediaId' })
   public media: Media;
 
   @ManyToOne(() => User, (user) => user.requests, {