Fleet collHash validation logs WiredTiger size metrics without tombstone payload. Once the size_stats walk publishes deleted cell count and bytes, include those fields on the 12951900 log line so a collection with leftover on-page tombstones is distinguishable from live data.

The line has no schema version today. Add an integer schemaVersion on the attr; it is required. keyCount/valueCount become live-only, and we may later drop the deleted fields. Unversioned lines are version 1. Bump to 2 when live counts change meaning and the deleted fields are added. Bump again if those fields are removed. Parsers must branch on schemaVersion. Do not keep v2 field names while the WT stats are gone and missing values would log as 0.