Discovery effort levels (Lower/Low/Medium/High/Higher → 20/40/60/80/100 steps) and an optional OperationCharger seam (nil/no-op by default) that cloud layers on to debit credits per operation; dashboard hides the pre-discovery $ estimate on cloud. Inert for community/self-hosted — no behavior change. Foundational for the cloud credit economy (control-plane #103). See CHANGELOG.md.