refactor(parser): Improve EventBridge models with examples and descriptions

[leandrodamascena]

Issue number: #7089

Summary

Enhances the EventBridgeModel with field descriptions and examples using Pydantic's Field() functionality. This improvement provides better documentation and metadata for EventBridge event model.

This change is fully backward compatible - no breaking changes to existing validation and serialization process.

Changes

Please provide a summary of what's being changed

User experience

Customers will be able to see examples and description when serializing models.

Checklist

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• Meet tenets criteria
• I have performed a self-review of this change
• Changes have been tested
• Changes are documented
• PR title follows conventional commit semantics

Is this a breaking change?

RFC issue number:

Checklist:

• Migration process documented
• Implement warnings (if it can live side by side)

Acknowledgment

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[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

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.34%. Comparing base (96f30bf) to head (18a46ae).
⚠️ Report is 2 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #7090   +/-   ##
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  Coverage    96.34%   96.34%           
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  Files          275      275           
  Lines        12980    12980           
  Branches       965      965           
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  Hits         12505    12505           
  Misses         367      367           
  Partials       108      108           

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