feat(google-gemini): update model YAMLs [bot]

[harshiv-26]

Auto-generated by poc-agent for provider google-gemini.

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Note

Low Risk
Low risk config-only changes to model metadata and pricing fields; main risk is misconfiguring token/cost parameters that could affect billing or UI limits.

Overview
Updates Google Gemini model YAML configs: aqa now declares configurable max_tokens params and is marked active.

Adds output_cost_per_image_token pricing to gemini-3.1-flash-image-preview, and removes the tool_choice feature flag from gemma-3-4b-it.

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[github-actions]

/test-models

[harshiv-26]

Gateway test results

• Total: 3
• Passed: 2
• Failed: 0
• Validation failed: 0
• Errored: 0
• Skipped: 1
• Success rate: 100.0%

Provider	Model	Scenarios
google-gemini	gemini-3.1-flash-image-preview	skipped: skip-check
google-gemini	gemma-3-4b-it	success: params, params:stream

Skipped (1)

google-gemini/gemini-3.1-flash-image-preview — skip-check (skipped)

Skip reason:

unsupported mode 'image'

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

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