fix: deduplicate component metadata versions

[lixd]

Summary:

• Aggregate component metadata entries by Kubernetes version.
• Merge duplicate architecture values into each version architecture list.
• Reuse normalization for online and offline metadata.

Verification:

• ESLint passed.
• Unit tests passed (47 tests).
• Production build passed.

[gemini-code-assist]

Caution

The consumer version of Gemini Code Assist on GitHub has been sunset. All code review activity has officially ceased.

[lixd]

/lgtm

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 47.30%. Comparing base (c8ec5fe) to head (77801fe).
⚠️ Report is 5 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #429   +/-   ##
=======================================
  Coverage   47.30%   47.30%           
=======================================
  Files           7        7           
  Lines         613      613           
  Branches      176      176           
=======================================
  Hits          290      290           
  Misses        250      250           
  Partials       73       73           

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