chore(server): change transcode default to accept all supported audio codecs (#7283)

* change transcode defaults

* don't untick accepted audio codecs

* no need to change the transcode policy

* fix tests

* remove log

server/src/infra/entities/system-config.entity.ts

@@ -7,7 +7,7 @@ export class SystemConfigEntity<T = SystemConfigValue> {
   key!: SystemConfigKey;
 
   @Column({ type: 'varchar', nullable: true, transformer: { to: JSON.stringify, from: JSON.parse } })
-  value!: T;
+  value!: T | T[];
 }
 
 export type SystemConfigValue = string | number | boolean;