Use stack for mongo spy spans

[estolfo]

Instead of relying on the operation id, let's just use a stack to keep track of mongo spy spans.

[ghost]

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• Start Time: 2021-12-09T11:35:34.612+0000

• Duration: 26 min 39 sec

• Commit: 38a5386

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Total	46867

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[estolfo]

@jclusso Do you want to try this PR out? We think it might solve the MongoDB spans issue. Please let us know how it goes!

[jclusso]

@estolfo giving it a shot now!

[jclusso]

Looks promising so far. I'll update you after a day or so.

[estolfo]

@jclusso Great! We look forward to hearing back tomorrow!

[jclusso]

@estolfo no luck :( - on the bright side I did find a span that is traced and you can see all the stacktraces that don't make any sense. If you want to coordinate another Zoom, email me - jarrett@cacheventures.com.

[jclusso]

@estolfo I noticed we're still using your fork on the mongo-forking branch. Should we still be using this or is that merged in? I can't find the issue where you told us to give that a try.

[jclusso]

@estolfo any word on the above?

[estolfo]

Hi @jclusso I responded to your other comment here

[jclusso]

Not sure why I never got the notification. Thought I had commented but couldn’t find it. Thanks.