5.4 — Add comprehensive health checks

[davidortinau]

Description

Implement comprehensive health check endpoints for liveness and readiness probes. Services report their health status to Azure Container Apps, which uses this data for scaling and restart decisions.

Dependencies

• Depends on 3.5 — Configure Azure Container Apps for services #52 (Container Apps)

Acceptance Criteria

• /health endpoint returns full health status:
  • Database connectivity (PostgreSQL)
  • Cache connectivity (Redis)
  • Storage connectivity (Blob Storage)
  • Entra ID reachability
  • External API reachability (OpenAI)
• /alive endpoint returns 200 (liveness probe)
• Health check format: application/health+json
• Tested: all health checks return correct status
• Container Apps health probes configured to call /health and /alive
• Aspire dashboard visualizes health status

Technical Notes

• ASP.NET Core health checks middleware already available
• Health checks return detailed status on dependent services
• Liveness vs readiness: alive = process running, health = ready to serve
• Configure probes in Container Apps settings

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Phase: 5 | Size: M | Owner: Kaylee (Full-stack Dev)