Completed tasks

~~Overlay tree migration: push performance improvements to see if we can support >1k migrated key-values even in the least powerful setups like Rock5B.~~

~~Decide if State Expiry is still an option for a migration strategy~~

~~Explore writeable Merke migration path~~

~~Relaunch of Kaustinen~~

~~Discuss and analyze the impact of gas cost changes in the migration phase~~

See writeup from Guillaume

~~Preimage generation and distribution strategy (summary of current options)~~

~~Cryptography test vectors~~

Refine EIP-4762 spec

Polish EIP-2935 proposal to be included in Pectra

Include the Overlay Tree migration logic in the spec