chore: update node, update deps, add dependabot config. more production readiness

[alchemydc]

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[codecov-commenter]

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Codecov Report

❌ Patch coverage is 20.00000% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 76.39%. Comparing base (cb5df8f) to head (d25b29c).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/services/llm/AiSdkProcessor.ts	20.00%	1 Missing and 3 partials ⚠️
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Additional details and impacted files

@@            Coverage Diff             @@
##             main      #22      +/-   ##
==========================================
+ Coverage   72.30%   76.39%   +4.08%     
==========================================
  Files          17       13       -4     
  Lines        1643      538    -1105     
  Branches      177      142      -35     
==========================================
- Hits         1188      411     -777     
+ Misses        449       43     -406     
- Partials        6       84      +78     

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