fix: use conversation message event

[cristipufu]

Ref: UiPath/uipath-langchain-python#300

Development Package

• Add this package as a dependency in your pyproject.toml:

[project]
dependencies = [
  # Exact version:
  "uipath-dev==0.0.11.dev1000240070",

  # Any version from PR
  "uipath-dev>=0.0.11.dev1000240000,<0.0.11.dev1000250000"
]

[[tool.uv.index]]
name = "testpypi"
url = "https://test.pypi.org/simple/"
publish-url = "https://test.pypi.org/legacy/"
explicit = true

[tool.uv.sources]
uipath-dev = { index = "testpypi" }