Engine crashes when client sends nan or inf float to UI

[MFornander]

The requests JSON serializer defaults to not handling nan or inf floats and instead throws an exception that crashes the engine. The tracking/utils:make_json_safe function does not make objects safe enough to avoid this and doesn't detect it since the json.dumps check doesults to allowing nans.

Current behavior

Engine crashes if a node returns nan or inf floats.

Stack Traces

Traceback (most recent call last):
  File "/opt/homebrew/Cellar/python@3.13/3.13.11_1/Frameworks/Python.framework/Versions/3.13/lib/python3.13/threading.py", line 1044, in _bootstrap_inner
    self.run()
    ~~~~~~~~^^
  File "/opt/homebrew/Cellar/python@3.13/3.13.11_1/Frameworks/Python.framework/Versions/3.13/lib/python3.13/threading.py", line 995, in run
    self._target(*self._args, **self._kwargs)
    ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/mfornander/gitlab/dcsim/.venv/lib/python3.13/site-packages/hamilton_sdk/api/clients.py", line 236, in worker
    self.flush(batch)
    ~~~~~~~~~~^^^^^^^
  File "/Users/mfornander/gitlab/dcsim/.venv/lib/python3.13/site-packages/hamilton_sdk/api/clients.py", line 262, in flush
    response = requests.put(
        f"{self.base_url}/dag_runs_bulk?dag_run_id={dag_run_id}",
    ...<5 lines>...
        verify=self.verify,
    )
  File "/Users/mfornander/gitlab/dcsim/.venv/lib/python3.13/site-packages/requests/api.py", line 130, in put
    return request("put", url, data=data, **kwargs)
  File "/Users/mfornander/gitlab/dcsim/.venv/lib/python3.13/site-packages/requests/api.py", line 59, in request
    return session.request(method=method, url=url, **kwargs)
           ~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/mfornander/gitlab/dcsim/.venv/lib/python3.13/site-packages/requests/sessions.py", line 575, in request
    prep = self.prepare_request(req)
  File "/Users/mfornander/gitlab/dcsim/.venv/lib/python3.13/site-packages/requests/sessions.py", line 484, in prepare_request
    p.prepare(
    ~~~~~~~~~^
        method=request.method.upper(),
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    ...<10 lines>...
        hooks=merge_hooks(request.hooks, self.hooks),
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/Users/mfornander/gitlab/dcsim/.venv/lib/python3.13/site-packages/requests/models.py", line 370, in prepare
    self.prepare_body(data, files, json)
    ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
  File "/Users/mfornander/gitlab/dcsim/.venv/lib/python3.13/site-packages/requests/models.py", line 512, in prepare_body
    raise InvalidJSONError(ve, request=self)
requests.exceptions.InvalidJSONError: Out of range float values are not JSON compliant

Screenshots

n/a

Steps to replicate behavior

Add this simple node, enable on tracking on a working UI server, and ask for the node's result.

def nan_inf() -> list[float]:
    return [1.0, float("nan"), float("inf")]

Library & System Information

Python 3.13
Hamilton 1.89

Expected behavior

Not crashing and showing nan and inf values as "null" in UI.

Additional context

I have a simple fix for your make_json_safe function. Let me know if you want a PR.