perf: Use faster registry verification

[FrederikBolding]

Bump snaps-registry to the latest version which changes verify to be async in order to use the global crypto digest API, which is much faster.

---

Note

Switches registry signature verification to async and bumps @metamask/snaps-registry to v4 for faster verification.

• Snaps Controllers:
  • Make #verifySignature async; await verify and its call in #update.
• Dependencies:
  • Bump @metamask/snaps-registry to ^4.0.0 in packages/snaps-controllers and packages/snaps-utils.

^{Written by Cursor Bugbot for commit 3a83139. This will update automatically on new commits. Configure here.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.28%. Comparing base (e21d3a3) to head (3a83139).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3770   +/-   ##
=======================================
  Coverage   98.28%   98.28%           
=======================================
  Files         420      420           
  Lines       12211    12211           
  Branches     1889     1889           
=======================================
  Hits        12002    12002           
  Misses        209      209           

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[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	@​metamask/​snaps-registry@​3.3.0 ⏵ 4.0.0	+2		+12	+13

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