Implement Previous Medicines Retrieval for Patients

Issue Summary

Add functionality to retrieve a patient’s previous prescriptions (medicines) via an API endpoint.

Current Behavior: There is no way to fetch previously prescribed medicines for a patient.

Expected Behavior: System should provide an endpoint to return all past prescriptions for a given patient.

Problem Statement

What is missing? No API exists to fetch previous medicines. Impact: Slower workflow Poor patient history tracking Reproduction: Try fetching past medicines → No endpoint available

Proposed Solution

Create a new API endpoint Add a button to Retrieve previous medicines.

Test-Driven Development

Acceptance Criteria (Given-When-Then)

Scenario 1: Fetch previous prescriptions successfully

Given a valid patient ID exists And the patient has previous prescriptions When the client requests previous medicines Then the system returns a list of medicines And each record contains name, dosage, frequency, and date

Scenario 2: Patient has no prescriptions

Given a valid patient book number exists And the patient has no previous prescriptions When the client requests previous medicines Then the system returns an no previous prescriptions message