Identify Eligible Capacity Reservation Spend

Identifies charges eligible for capacity-reservation commitment programs, distinguishing between used and unused reservations. Capacity reservations secure resource availability rather than provide discounts, and are tracked via CapacityReservationId and CapacityReservationStatus rather than the commitment discount columns. Filters CommitmentProgramEligibilityDetails to rows whose ProgramType values correspond to capacity-reservation programs (e.g., AdvanceResourceCommitment, ZonalResourceCommitment), then uses CapacityReservationId and CapacityReservationStatus to determine reservation utilization.