Add MVP dashboard API for MePRAM

[Aberdur]

PR Description

Adds the first MePRAM API MVP, implemented as a read-only Django/DRF service over the aggregated PostgreSQL dashboard schema generated from OMOP data.

The project structure follows the PathoCore API layout where practical:

• conf/ for settings, URLs, WSGI and requirements
• core/api/services/ for query/service logic
• core/api/v1/ for serializers, views and routes
• Docker test stack with PostgreSQL + API
• OpenAPI/Swagger via drf-spectacular

Scope

This API exposes aggregated dashboard data from dashboard.sql:

• cohort summaries
• OMOP domains
• concepts
• concept facts
• numeric measurements
• categorical measurements
• age, sex and age+sex stratifications

Main Endpoints

• GET /v1/health
• GET /v1/metadata
• GET /v1/capabilities
• GET /v1/cohort/summary
• GET /v1/domains
• GET /v1/domains/{domain_id}/concepts
• GET /v1/concepts
• GET /v1/concepts/{concept_id}
• GET /v1/concepts/{concept_id}/detail
• GET /v1/facts/concepts
• GET /v1/measurements/numeric
• GET /v1/measurements/categorical

[Daniel-VM]

All these queries don’t follow the Django ORM definition. It might be worth considering creating a models.py that matches the current DB definition. This could help with future migrations when the DB design gets updated.