fix memory leaks

[Mnigos]

• Timers and Intervals Repeatedly setting timers or intervals without clearing them can lead to memory leaks. Ensure that you clear intervals and timeouts when they are no longer needed.

https://www.netguru.com/blog/node-js-memory-leaks

[Mnigos]

https://github.com/lloyd/node-memwatch

[Mnigos]

https://github.com/OptimalBits/bull/issues/1194

[Mnigos]

The issue might be related with delayed jobs. Getting back to manually setting intervals and them clearing them might resolve this issue.

[Mnigos]

try migrate to bullmq https://github.com/OptimalBits/bull/issues/1110#issuecomment-568883963

[Mnigos]

Some of memory leaks might caused by HistoryTracksService.create method.

[Mnigos]

https://github.com/typeorm/typeorm/issues/8267

[Mnigos]

setup AppSignal

https://appsignal.com