Response streaming broken after migration to Gemini Interactions API

[remygendron]

🔴 Required Information

Describe the Bug:

• is_final_response() reports True event if turn_complete == False.
• Response is now spread over multiple event.content.parts, even if turn_complete == True. The 'generate content' API would bundle a final response into parts[0], even for very large responses.
• The final response is duplicated in the same event. Weirder still, the duplication starts in the same part, making deduplication difficult to implement.

Expected Behavior:

• is_final_response() semantics are respected.
• Can live with Interactions API spreading the response over multiple parts.
• Can't live with response duplication, more so if duplication starts in the same part/string.

[remygendron]

After investigating, you must only capture when is_final_response() and turn_complete.

That final event's parts contain the complete final response without duplication.