Commit history for docs/metering.md
- Harden metering per review: nonce-based reservations, cross-meter spending limits incl. CI dispatch, claim binding and hold transfer, paged gauge rollups that follow claims, cancel-safe stream counting, chunk-safe fetch/clone detection, period-clamped commits44810ad⌁taigrr committed
- Add usage metering core: idempotent D1 ledger with trigger rollups, Analytics Engine, reservations, plans, alerts and docsc9df489⌁taigrr committed
