fix(patch): cherry-pick 049a299 to release/v0.17.0-preview.1-pr-13483 to patch version v0.17.0-preview.1 and create version 0.17.0-preview.2

[gemini-cli-robot]

This PR automatically cherry-picks commit 049a299 to patch version v0.17.0-preview.1 in the preview release to create version 0.17.0-preview.2.

[gemini-code-assist]

Summary of Changes

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This pull request automates the creation of a new preview release version by cherry-picking a specific commit. The primary functional change introduces a unified and consistent approach within the model routing service to prioritize upgrading to the preview Gemini model when applicable, ensuring that the system actively attempts to utilize newer models under specified conditions.

Highlights

• Automated Versioning: This pull request is an automated cherry-pick of commit 049a299b9214521fb441e4f8fb247f4db6b54045 to create a new preview version (v0.17.0-preview.2) from v0.17.0-preview.1.
• Unified Preview Model Upgrade Logic: The ModelRouterService now includes unified logic to always attempt upgrading to the PREVIEW_GEMINI_MODEL (gemini-3.0-pro) if the initial routing decision is DEFAULT_GEMINI_MODEL (gemini-2.5-pro) and preview features are enabled, even in probing scenarios.
• Updated Test Behavior: Corresponding tests in modelRouterService.test.ts have been updated to reflect this new behavior, asserting that the model should upgrade to the preview model in relevant scenarios, including when fallback mode is active for probing.

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[gemini-code-assist]

Code Review

This pull request cherry-picks a commit that refactors and fixes the logic for upgrading to a preview model. The changes centralize the decision to upgrade to PREVIEW_GEMINI_MODEL within the ModelRouterService. The new logic correctly upgrades the model when preview features are enabled and the model choice is not a user override, while also allowing for periodic "probing" of the preview model during fallback modes. The accompanying test updates in modelRouterService.test.ts accurately reflect and validate this new behavior. The changes are well-implemented and improve the clarity and correctness of the model routing logic.

[github-actions]

Size Change: +358 B (0%)

Total Size: 20.6 MB

ℹ️ View Unchanged

Filename	Size	Change
./bundle/gemini.js	20.6 MB	+358 B (0%)
./bundle/sandbox-macos-permissive-closed.sb	1.03 kB	0 B
./bundle/sandbox-macos-permissive-open.sb	890 B	0 B
./bundle/sandbox-macos-permissive-proxied.sb	1.31 kB	0 B
./bundle/sandbox-macos-restrictive-closed.sb	3.29 kB	0 B
./bundle/sandbox-macos-restrictive-open.sb	3.36 kB	0 B
./bundle/sandbox-macos-restrictive-proxied.sb	3.56 kB	0 B

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