We need to create a metric to detect and track instances when a WT (WiredTiger) page read from the PageServer is corrupted.

 Page corruption can occur at various points in the disaggregation architecture:

1. Primary sending corrupted pages to the LogServer:
   Pages can be corrupted before being sent to the LogServer.
2. Primary encryption errors:
   Pages may be encrypted incorrectly by the primary node due to issues with the Key Encryption Key (KEK) or Data Encryption Key (DEK).
3. PageMaterializer corruption:
   Pages may get inadvertently corrupted while being processed by the PageMaterializer.
4. PageServer corruption:
   Pages may become corrupted within the PageServer itself.

Implementing this metric will enable us to monitor and promptly identify corruptions to minimize their operational effects.