fix(patient-status): return only completed stages in patient status response

name: Bug Report
about: Report a bug in the EHRS Backend.
title: "fix(patient-status): return only completed stages in patient status response"
labels: "bug"
assignee: 'koushik'

🐛 Bug Report

Describe the bug

The patient status API was returning workflow stages before they were actually completed.

In particular, vitals and know_your_patient could appear in the response body just because the patient had entered that queue or reached that step. The backend was inferring completion from queue position instead of using true completion signals.

To Reproduce

1. Register a patient for the latest camp.
2. Move the patient into the vitals queue without completing vitals.
3. Call the patient status endpoint.
4. Observe that vitals may appear in the response before vitals are completed.

Or:

1. Complete vitals so the patient moves to know_your_patient.
2. Keep the patient actively in the know_your_patient queue without completing that stage.
3. Call the patient status endpoint.
4. Observe that know_your_patient may appear in the response before it is completed.

Expected behavior

The patient status response should contain only genuinely completed stages.

• vitals should appear only after vitals are completed.
• know_your_patient should appear only after Know Your Patient is completed.
• A stage should not appear only because the patient has entered that queue.

Screenshots

Environment

• OS: Linux
• Backend: EHRS FastAPI backend
• API Area: Patient status endpoint