Automatically Trace from Playground

[Chinoman10]

Describe the feature or potential improvement

I'd like to have a (trace) record of the playground runs (if I want to trace them).
Sometimes, as I am experimenting with different prompts, I try different contents in variables that I create, and I'd like to store the content of those variables so I can come back to them later. If these runs were traced, I could just find my playground runs and copy from there...

Additional information

Considering Langfuse's billing is based on number of observations, this would increase the usage too, which affects the bottom line in a positive way also (not that a few dozen/hundred runs executed every other day will make a big difference, but still).