Updated Google GenAI SDK to 1.30.0 and updated tests due to deprecation of an embeddingmodel

[ddobrin]

These changes are required for

• Native Image support - mandatory upgrade to 1.30.0
• Deprecation of text-embedding-004 on Jan 14, 2026

Could this be merged into the 2.0.0 branch and backported to a 1.1.x fixes branch?

cc: @markpollack @ilayaperumalg @tzolov

[markpollack]

usually we should not change the default for the 1.1.x branch. the TEXT_EMBEDDING_004 is going away next month @ddobrin so this makes it an awkward situation for 1.1.x users, in partiuclar as there are dimension changes.

[ddobrin]

I think in this case the default should change to text_embedding_005, with the same dimensions

[markpollack]

suggestions

• Fix the typo in documentation: change 'gemini-enmbedding-001' to 'gemini-embedding-001' in the deprecation note (line 199 of the .adoc file)
• Add a prominent migration guide section to the documentation explaining how users with existing text-embedding-004 embeddings should handle the dimension change when upgrading
• Consider adding a deprecation warning log message when text-embedding-004 is explicitly specified, alerting users to the January 2026 sunset date
• Clarify in documentation which model should be used for which use case: text-embedding-005 (768 dims) vs gemini-embedding-001 (3072 dims) and the trade-offs
• Add a test case that explicitly validates backward compatibility when text-embedding-004 is still used (before Jan 2026) to ensure the transition period works correctly
• Document the batch size limitation of gemini-embedding-001 in the main properties table, not just in code comments, as this has significant performance implications

[ddobrin]

@markpollack - I'll update as per your suggestions first thing in the morning