refactor(crypto): harden and optimize timingSafeEqual()

[tomas-zijdemans]

• Length mismatch now throws TypeError instead of returning false, matching node:crypto.timingSafeEqual behaviour (this is a security issue with the current implementation. Every call should take the same amount of time regardless of whether the values match or not)
• Switched internal comparison from DataView.getUint8() to Uint8Array indexing. Twice as fast for typical hash digest sizes (32–64 bytes).
• Removed redundant DataView from the parameter union type. DataView already satisfies ArrayBufferView, so DataView inputs still work.
• Replacedwhile (++i)loop with standard for loop for readability.
• Added JSDoc note about V8 JIT and SharedArrayBuffer constant-time limitations.
• Added tests for raw SharedArrayBuffer inputs and TypeError on length mismatch.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.01%. Comparing base (6df7f21) to head (68846d2).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7042   +/-   ##
=======================================
  Coverage   94.01%   94.01%           
=======================================
  Files         627      627           
  Lines       50029    50031    +2     
  Branches     8807     8808    +1     
=======================================
+ Hits        47037    47039    +2     
  Misses       2413     2413           
  Partials      579      579           

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[iuioiua]

WDYT @kitsonk?