TECH: max number of parallel processes

• add option to set maximum number of parallel processes
• use this value in preprocessing
• use this value in data handler transformation

added Doing enhancement technical labels

created merge request !301 (merged) to address this issue

mentioned in merge request !301 (merged)

mentioned in commit 92763f13

added .done label and removed Doing label

added merged in Develop label and removed .done label

marked the checklist item add option to set maximum number of parallel processes as completed

marked the checklist item use this value in preprocessing as completed

marked the checklist item use this value in data handler transformation as completed

closed with commit 92763f13

closed with merge request !318 (merged)

mentioned in commit 1634c669