Zhipu AI model fails to retrieve usage info from ChatResponse upon chat completion

[yunqilee69]

Bug description
Zhipu AI model fails to retrieve usage info from ChatResponse upon chat completion

Environment
Spring AI： 1.1.0

Minimal Complete Reproducible example
When invoking the Zhipu chatModel class directly via its call() or stream() methods, the usage information is unavailable in the returned response.

[yunqilee69]

I’ve submitted a PR to fix the issue; this is my first contribution, so please let me know if I’ve done anything wrong.
PR Link