Serialize experiments #384
Description
Currently we serialize and save experiment data and analysis results and figures, but we don't save the experiment. Because of this, we can't always run analysis on loaded experiment data. To fix this issue, we can either save the experiment, or identify and save only the components of the experiment that are required for the analysis.
In a recent discussion, @chriseclectic mentioned that experiment serialization will be required also when connecting qiskit-experiments with runtime (@chriseclectic please give more details, thanks).