#2494 Adding new model/{model id} endpoint to allow use of Strata with Visual Studio

Description

## Title
Adding new model endpoint to allow use of Strata with Visual Studio

## Summary
For visual studio it is needed to have the /v1/models/{model id} endpoint to allow checking to accept custom models.

## What changed
- Added route to server.py
- added route to Readme
- added small unit test

## Extra Notes
-