AI Automation Suggester 1.5.6

This patch fixes Gemini 2.5 Flash structured-output requests.

Highlights

• Sends a Google Gemini-compatible response schema that omits JSON Schema keywords rejected by the Gemini API.
• Preserves the fuller JSON schema for OpenAI-compatible providers that accept it.

Fixed

• Resolves Gemini API 400 INVALID_ARGUMENT errors mentioning unsupported additionalProperties fields in generation_config.response_schema.