fix(deps): revert simple-zstd from 2.1.0 back to 1.4.2

[michael-s-molina]

SUMMARY

Reverts #38662.

The v2 bump introduced breaking API changes (ZSTDDecompress renamed to decompress, now async) that caused npm run dev-server to stop working. Even with the fixes attempted in #39138, the application was still freezing when navigating between pages.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

N/A

TESTING INSTRUCTIONS

1. Run npm ci in superset-frontend/
2. Start the Superset backend
3. Run npm run dev-server
4. Navigate between pages — no freezing or proxy errors

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 64.52%. Comparing base (d796543) to head (904c861).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #39139   +/-   ##
=======================================
  Coverage   64.52%   64.52%           
=======================================
  Files        2536     2536           
  Lines      131208   131208           
  Branches    30457    30457           
=======================================
  Hits        84661    84661           
  Misses      45084    45084           
  Partials     1463     1463           

Flag	Coverage Δ
javascript	66.06% <ø> (ø)

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[sadpandajoe]

@michael-s-molina in the future, we should probably leave a comment when we revert packages to a lower version. I can see dependabot bumping this, someone not knowing and approving this. I'm guessing I could have easily been an approver of this if it was a dependabot bump

[hainenber]

Thanks @michael-s-molina for covering me on this one! I'll probably need to add some test harness for safe upgrade when it comes to external deps like zstd.