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## Problem We have several serious data corruption incidents caused by mismatch of get-age requests: https://neondb.slack.com/archives/C07FJS4QF7V/p1723032720164359 We hope that the problem is fixed now. But it is better to prevent such kind of problems in future. Part of https://github.com/neondatabase/cloud/issues/16472 ## Summary of changes This PR introduce new V3 version of compute<->pageserver protocol, adding tag to getpage response. So now compute is able to check if it really gets response to the requested page. ## Checklist before requesting a review - [ ] I have performed a self-review of my code. - [ ] If it is a core feature, I have added thorough tests. - [ ] Do we need to implement analytics? if so did you add the relevant metrics to the dashboard? - [ ] If this PR requires public announcement, mark it with /release-notes label and add several sentences in this section. ## Checklist before merging - [ ] Do not forget to reformat commit message to not include the above checklist --------- Co-authored-by: Konstantin Knizhnik <knizhnik@neon.tech> Co-authored-by: Heikki Linnakangas <heikki@neon.tech>