Make id optional, add breed field

[reuvenharrison]

No description provided.

[oasdiff]

oasdiff API Change Report

🔴 2 breaking changes · 🟢 2 info

Severity	Change	Path	Review
🔴	the response property id became optional for the status 200	GET /pets	✅ Approved by @reuvenharrison
🔴	the response property id became optional for the status 200	GET /pets/{petId}	⏳ Review
🟢	added the optional property breed to the response with the 200 status	GET /pets/{petId}	View
🟢	added the optional property breed to the response with the 200 status	GET /pets	View

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Compared at b5ac5dc · 📋 Review & approve changes