[BE-30] Build HealthModule using @nestjs/terminus

[mftee]

Problem

@nestjs/terminus is installed as a dependency but never configured. There is no health check endpoint, making it impossible for deployment pipelines, load balancers, or monitoring tools to verify that the application and its dependencies are running correctly.

Proposed Solution

Create a HealthModule inside backend/src/module/health/ using @nestjs/terminus that checks all critical dependencies.

Acceptance Criteria

• GET /api/module/health returns a JSON health report
• Report checks PostgreSQL connectivity using TypeOrmHealthIndicator
• Report checks Redis connectivity using a custom health indicator that pings the Redis connection used by BullMQ
• Report checks available disk storage — warns if free space drops below 500MB
• Returns HTTP 200 when all checks pass with status: ok
• Returns HTTP 503 when any check fails with the failed indicator identified in the response body
• No authentication is required for this endpoint

[k2ghostyou]

@k2ghostyou has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

i would like to work on this issue

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[Ibinola]

@Ibinola has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hi can i be assigned this issue ?

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[drips-wave]

Congratulations, @Ibinola! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

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[drips-wave]

This issue has been completed by @Ibinola as part of the Stellar Wave Program's 5th Wave 🥳

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