feat(parser): add field metadata and examples for CloudWatch models

[sreejaaryahi18]

Issue number: closes #7121

Summary

Improved the documentation for the CloudWatch parser models by adding descriptions and example values to the fields using Pydantic's Field() function.

Changes

Please provide a summary of what's being changed
Added description and examples to all relevant fields in cloudwatch.py

User experience

Please share what the user experience looks like before and after this change
Before:
Fields in the models didn’t have any inline descriptions, so developers had to refer to external documentation or examples to understand them.
After:
Each field now includes a clear description and realistic example values

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[leandrodamascena]

Hey @sreejaaryahi18 please run make format before pushing a commit.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[leandrodamascena]

Thanks for working on this @sreejaaryahi18! Approved.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.36%. Comparing base (3808bd2) to head (dc3dd9f).
⚠️ Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #7343   +/-   ##
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  Coverage    96.36%   96.36%           
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  Files          275      275           
  Lines        13007    13007           
  Branches       968      968           
========================================
  Hits         12534    12534           
  Misses         366      366           
  Partials       107      107           

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