HTM-1961| HTM-1962: Initial implemententation of /events and /extract endpoints with CSV output format#1677

mprins merged 4 commits into

HTM-1960_Custom_extract_functionality_for_layer_attributesTailormap/tailormap-api:HTM-1960_Custom_extract_functionality_for_layer_attributesfrom

HTM-1961_initial_extract_endpointTailormap/tailormap-api:HTM-1961_initial_extract_endpointCopy head branch name to clipboard