Add the hybrid inference model deep thinking mode switching function
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The latest DeepSeekV3.1 is a hybrid inference model. Fortunately, the official API is separate, but the DeepSeekV3.1 big model deployed by other third parties does not enable deep thinking by default and requires manual activation, and many hybrid inference models do not enable deep thinking by default.
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If one day the official API merges the thinking mode with the model ID of the non-thinking mode, then it will need to be manually switched. The third parties now all have merged states and need to manually send parameters to start the thinking mode