fix(OpenAiNativeHandler): correct defaultTemperature logic

Reverses the conditional assignment to defaultTemperature so it
sets the default when supportsTemperature is true, and undefined
otherwise. Prevents models without temperature support from
receiving an unintended default value.

Author: snipeship

src/api/providers/openai-native.ts

@@ -1154,7 +1154,7 @@ export class OpenAiNativeHandler extends BaseProvider implements SingleCompletio
 			modelId: id,
 			model: info,
 			settings: this.options,
-			defaultTemperature: info.supportsTemperature ? undefined : OPENAI_NATIVE_DEFAULT_TEMPERATURE,
+			defaultTemperature: info.supportsTemperature ? OPENAI_NATIVE_DEFAULT_TEMPERATURE : undefined,
 		})
 
 		// For models using the Responses API, ensure we support reasoning effort