Bi-directional SAMP integration

@vermaas writes:

SAMP integration is ... in one direction only. Data only flows from the samphub to ESAP. I am not aware if there is a requirement to also let meta data flow from ESAP to the samphub?

My response: there is no hard requirement, but I think we should aspire to providing bi-directional SAMP. This issue exists to record that on the backlog, rather than as an immediate call-to-arms.