monitoring: register cost services and expose hourly cost metric

[Tobiloba0]

Summary

Register cost monitoring services to enable collection, tracking, and exposure of the infra_hourly_cost_usd metric for operational dashboards, monitoring, and alerting workflows.

Changes

• Added CostTrackingService to support infrastructure cost metric tracking.
• Added CostSchedulerService to schedule periodic cost metric collection.
• Added AwsCostCollectorService to provide AWS cost data collection capabilities.
• Registered all cost-related services in monitoring.module.ts providers and exports for application-wide availability.

Files Changed

monitoring.module.ts

Testing

Ran monitoring unit tests:

npm test -- --testPathPattern=monitoring -i

All monitoring-related tests passed successfully.

Notes / Follow-ups

• The scheduler currently records a placeholder hourly cost value (0) until cost data integration is completed.

• Future enhancements include:

  • Implementing POST /metrics/cost for local cost metric ingestion and validation.
  • Implementing GET /monitoring/cost/summary for cost reporting and monitoring.
  • Integrating with AWS Cost Explorer to retrieve real infrastructure cost data (requires AWS SDK configuration and appropriate credentials).

Closes #616