Answer this question about chain 1 over blocks 26019444 to 26026600, exactly as .imd/reads/oracle.json pins it:

What was the average sale price of Shellmates (contract 0xaa83d0d730bc8db70523e16dad847962c57075e0) on OpenSea over the pinned 24-hour block window on Ethereum mainnet, in wei? Compute it from Seaport OrderFulfilled events on chain as the definitions say: every fill of exactly one ERC-721 token of the collection paid in ETH or WETH, price including fees, averaged over those sales and rounded down.

Write only artifacts/answer.json: the typed answer (uint256) and the recipe that reproduces it.