fix: update Playwright to 1.56.1 to resolve security vulnerability

[jamesbhobbs]

Summary

Updates Playwright from 1.54.1 to 1.56.1 to fix moderate severity vulnerability GHSA-7mvr-c777-76hp, where Playwright downloads and installs browsers without verifying SSL certificate authenticity.

Changes

• Updated playwright and playwright-core from 1.54.1 to 1.56.1 in package-lock.json
• Fix applied via npm audit fix

Testing

• ✅ All unit tests pass (1415 passing)
• ✅ Lint checks pass
• ✅ Format checks pass

Review Checklist

• Verify version bump correctly addresses GHSA-7mvr-c777-76hp
• Confirm no unexpected changes in package-lock.json
• Consider running integration tests that use Playwright if available

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Link to Devin run: https://app.devin.ai/sessions/cd8da455c70c4cd797da66b575182718
Requested by: James Hobbs (james@deepnote.com) @jamesbhobbs

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 71%. Comparing base (9ad31d9) to head (856bcd3).
⚠️ Report is 1 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@          Coverage Diff          @@
##            main     #89   +/-   ##
=====================================
  Coverage     71%     71%           
=====================================
  Files        523     523           
  Lines      39001   39001           
  Branches    4905    4905           
=====================================
  Hits       27834   27834           
  Misses      9542    9542           
  Partials    1625    1625           

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