Verify that thought summaries work as expected with Gemini 3

[paulb777]

Description

See discussion at #15708 (comment) and associated nightly failure.

Reproducing the issue

No response

Firebase SDK Version

12.8

Xcode Version

26

Installation Method

Swift Package Manager

Firebase Product(s)

AI Logic

Targeted Platforms

N/A

Relevant Log Output

If using Swift Package Manager, the project's Package.resolved

Expand Package.resolved snippet

Replace this line with the contents of your Package.resolved.

If using CocoaPods, the project's Podfile.lock

Expand Podfile.lock snippet

Replace this line with the contents of your Podfile.lock!