Description
The preimage integration chapter states a few rules around which of the preimage extrinsics are integrated into the service's state, such as it being requested and it not being already provided and so on.
https://graypaper.fluffylabs.dev/#/cc517d7/181e02187802?v=0.6.5
The service preimage statistics section, however, seems to indicate that for any preimage extrinsic, designated for a service, we note the statistics for that.
https://graypaper.fluffylabs.dev/#/cc517d7/19be0319e303?v=0.6.5
The test vectors recently merged in #28 seem to follow the rule that a preimage's statistics are only noted if it is integrated. For example, the preimage-not-needed files.
My guess is that I am misinterpreting the statistics, and the test vectors are doing the right thing: A preimage should only be noted in the statistics if it is integrated.