feat: support attesting signing key for Hyperlane AVS

[aroralanuk]

Description

• Adding support for attesting signing key and key rotation from here feat: ecdsa key rotation Layr-Labs/eigenlayer-middleware#252

Drive-by changes

None

Related issues

None

Backward compatibility

Yes

Testing

Tested by Eigenlayer here: https://github.com/Layr-Labs/eigenlayer-middleware/blob/dev/test/unit/ECDSAStakeRegistryUnit.t.sol

[changeset-bot]

⚠️ No Changeset found

Latest commit: 9496e83

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[codecov]

Codecov Report

Attention: Patch coverage is 13.88889% with 31 lines in your changes are missing coverage. Please review.

Project coverage is 62.96%. Comparing base (0cf692e) to head (9496e83).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3847      +/-   ##
==========================================
- Coverage   63.47%   62.96%   -0.52%     
==========================================
  Files         125      125              
  Lines        1555     1574      +19     
  Branches      170      173       +3     
==========================================
+ Hits          987      991       +4     
- Misses        542      556      +14     
- Partials       26       27       +1     

Components	Coverage Δ
core	84.61% <ø> (ø)
hooks	67.50% <ø> (ø)
isms	39.52% <ø> (ø)
token	60.83% <ø> (ø)
middlewares	77.05% <ø> (ø)