Fixing the issue of route drop-point API while calculating total KM
Refactor: removed the function of get_nearest_coordinates_sequence
Feature: enabled the calculation of total_km in drop point API
Refactor: removed logic of get_nearest_coordinates_sequence
Refactor: refactored the code of customer route service by using annotate method from manager
Feature: added annotate method for customer lat long
Bugfix: fixed the issue of calculation of total_km in route drop points API