Can not use startSpan so I downgrade to sentry@7.57.0 to use startTransaction

[vvvhung]

I found this was discussed here #9802 but it is closed so I create a new one to bring attention.

I found it hard to do custom instrument with startSpan since I want to have child spans and I don't want to do refactor to put my logic inside span callback (I don't find any reason to do that.) I also have transactions start and end at different files.

With startTransaction I can easily start a new transaction any time and add its own child spans with startChild and finish them at the right time. I don't understand why these methods were deprecated. They are useful for monitoring socket performance. I hope they will be available in future release.