DefaultToolExecutionExceptionProcessor should include exception when logging

[DefaultToolExecutionExceptionProcessor](https://github.com/spring-projects/spring-ai/blob/main/spring-ai-model/src/main/java/org/springframework/ai/tool/execution/DefaultToolExecutionExceptionProcessor.java#L80) logs a message when a tool execution fails, but it does not include the exception.

It would be nice to get access to the stack trace by including the exception in the call to the logger.