Enhance analytics-routes to return all patient visit status counts

Currently, the analytics-routes API only returns limited patient visit status counts such as:

patients_registered

patients_done_vitals

Other important workflow statuses are not included in the response, resulting in incomplete analytics data on dashboards.

This update enhances the analytics route to return counts for all patient visit statuses, including:

Doctor Assignment

Medicines Prescribed

Medicine Verification

Counseling Done