FULU mainnet

[tbenr]

as per ethereum/consensus-specs#4689

Documentation

• I thought about documentation and added the doc-change-required label to this PR if updates are required.

Changelog

• I thought about adding a changelog entry, and added one if I deemed necessary.

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Note

Sets mainnet Fulu fork epoch, introduces a blob schedule with increased MAX_BLOBS_PER_BLOCK at specified epochs, refines spec search, and updates default milestone test to FULU.

• Mainnet Config (ethereum/spec/.../mainnet.yaml):
  • Set FULU_FORK_EPOCH to 411392.
  • Add BLOB_SCHEDULE with entries increasing MAX_BLOBS_PER_BLOCK to 15 at epoch 412672 and 21 at epoch 419072.
• REST API Test Resource (data/.../mainnetConfig.json):
  • Mirror FULU_FORK_EPOCH and BLOB_SCHEDULE updates.
• Spec Refs (specrefs/configs.yml):
  • Refine MAX_BLOBS_PER_BLOCK lookup to ^MAX_BLOBS_PER_BLOCK: with regex: true.
• Tests (teku/.../Eth2NetworkOptionsTest.java):
  • Update default highest supported milestone to SpecMilestone.FULU.

^{Written by Cursor Bugbot for commit 13b0a18. This will update automatically on new commits. Configure here.}

[rolfyone]

LGTM