🤖 Enhancements to Pydantic Models with Default Values

[sentry-autofix]

👋 Hi there! This PR was automatically generated by Autofix 🤖

This fix was triggered by Jenn Mueng

Fixes SEER-C1

This update introduces enhancements to the Pydantic models used in the insight sharing and autofix components. In the insight_sharing/models.py file, the generated_at_memory_index attribute of the InsightSharingOutput class now has a default value of -1, utilizing Pydantic's Field for better default management. Similarly, in the autofix/models.py file, the insights attribute of the DefaultStep class is now initialized with an empty list using Field(default_factory=list), ensuring that the list is properly instantiated by default. These changes improve the robustness and reliability of the model defaults.

If you have any questions or feedback for the Sentry team about this fix, please email autofix@sentry.io with the Run ID (see below).

🤓 Stats for the nerds:

Run ID: 1013
Prompt tokens: 325899
Completion tokens: 9733
Total tokens: 335632