Add custom handler of exceptions

[aponcedeleonch]

This will change the way we visualize the Exceptions in FastAPI to a more traditional unformatted approach.

  File "/Users/aponcedeleonch/py_venvs/codegate_env/lib/python3.12/site-packages/anyio/_backends/_asyncio.py", line 2505, in run_sync_in_worker_thread
    return await future
           ^^^^^^^^^^^^
  File "/Users/aponcedeleonch/py_venvs/codegate_env/lib/python3.12/site-packages/anyio/_backends/_asyncio.py", line 1005, in run
    result = context.run(func, *args)
             ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/aponcedeleonch/StacklokRepos/codegate/src/codegate/dashboard/dashboard.py", line 35, in get_messages
    raise Exception("This is a test exception")
2024-12-19T13:45:25.3dZ [error    ] module=server pathname=/Users/aponcedeleonch/StacklokRepos/codegate/src/codegate/server.py
2024-12-19T13:45:25.3dZ [info     ] ::1:59820 - "GET /dashboard/messages HTTP/1.1" 500 module=h11_impl pathname=/Users/aponcedeleonch/py_venvs/codegate_env/lib/python3.12/site-packages/uvicorn/protocols/http/h11_impl.py

The advantage would be that we would no longer get really long exceptions from FastAPI

[aponcedeleonch]

This is mostly cosmetic. Will leave it here but feel free to close without merging

[ptelang]

Looks good.