bug: tracing provider edits don't reflect

[bderenzi]

Here's what I did:

1. Created a new project on langfuse with a new API key
2. Created a new tracing provider and used an old langfuse API key
3. Connected my experiment to the new tracing provider, tested, realized it was sending new traces to the old project.
4. Edited the new tracing provider on OCS to use the new API key
5. Still sent traces to the old project space. Double checked. Triple checked. Still sent to the old project space
6. Made a new new tracing provider with the new API key, updated the experiment to use the new new tracing provider. Everything worked.

The error is that at step 4 it should have started sending stuff to the new provider. Is there some langfuse object that is instantiated in memory that doesn't get updated when we edit the provider?