Describe the bug
Calling Clone() on OllamaPromptExecutionSettings instance returns PromptExecutionSettings with Temperature, TopK, TopP and MaxTokens settings lost

To Reproduce

var testSettings = new OllamaPromptExecutionSettings {  Temperature = (float)temperature, TopP = (float)topP };

// Throws `InvalidCastExeception` always as testSettings is of  `PromptExecutionSettings` type. 
// Additionally, testSettings do not contain temperature or topP parameter values (nothing in ExtensionData either)
var result = (OllamaPromptExecutionSettings) testSettings.Clone();

Expected behavior
Object is cloned correctly like in OpenAI provider

Platform

• Language: C#
• Source: 1.65.0
• AI model: Ollama qwen3:32b
• IDE: Visual Studio
• OS: Windows

Additional context

I think it should work like OpenAIPromptExecutionSettings, where all information is properly Cloned.