MWL-RS Create / Update MWL : Use MWL Worklist Label config on archive AE as fall back, if Worklist Label (0074,1202) is missing or has no value in request payload - before falling back to *

[vrindanayak]

Related #3976, #4015

Rationale : Separation of worklists per client (tenant / institution / facility) is currently unavailable, if MWLs are created / updated using Create / Update Scheduled Procedure Step RS service and if Worklist Label (0074,1202) is missing or has no value in request payload, resulting in all MWLs in DB to be associated with *

Extend the fallback to first check if AE used in RS service has MWL Worklist Label configured - use it as fallback for mwl_item.worklist_label in DB - before falling back to *