Function Calling Filter Pipeline erroring out

[shadowdao]

The Function Calling Filter Pipeline have been erroring in the "inlet" portion. I have been documenting in the Discord troubleshooting section.

Some examples of the logs that I had been receiving:

`Connection error: Object of type ModelModel is not JSON serializable

ERROR [open_webui.routers.tasks] Error generating chat completion: (500, 'list index out of range')
Connection error: 500 Server Error: Internal Server Error for url: http://pipelines:9099/test-pipeline/filter/inlet
INFO: 192.168.1.1:0 - "POST /api/v1/tasks/auto/completions HTTP/1.1" 500 Internal Server Error`

As a part of the troubleshooting process, I created a single pipeline that had the functionality of calling functions. I initially used the Function Calling Blueprint, and I got the error again.

I then started pulling parts from within the Blueprint to isolate the issue, and I found that the problem comes from how the Params are passed to the call_function part of the code.

I plan to submit a PR with the fix for this in the coming days.