Fix: extract output with streaming

[cristipufu]

Development Package

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

[project]
dependencies = [
  # Exact version:
  "uipath-langchain==0.0.132.dev1001910608",

  # Any version from PR
  "uipath-langchain>=0.0.132.dev1001910000,<0.0.132.dev1001920000"
]

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

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

[Copilot]

Pull Request Overview

This PR extracts output with streaming support by refactoring the runtime architecture to use a more flexible graph resolution system. The key changes include separating graph resolution from runtime execution and improving streaming capabilities.

• Introduces a new GraphResolver class to handle graph configuration and loading
• Replaces LangGraphRuntime with LangGraphScriptRuntime that uses the resolver pattern
• Improves streaming output extraction by handling both messages and updates in the same stream

Reviewed Changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/uipath_langchain/_cli/cli_run.py	Updates imports and runtime factory to use LangGraphScriptRuntime
src/uipath_langchain/_cli/cli_eval.py	Updates runtime usage and adds runtime generator function
src/uipath_langchain/_cli/cli_dev.py	Updates to use new runtime class with generator function
src/uipath_langchain/_cli/_runtime/_runtime.py	Major refactor: extracts graph resolution, improves streaming, creates base and script runtime classes
src/uipath_langchain/_cli/_runtime/_graph_resolver.py	New file implementing graph resolution logic extracted from runtime
src/uipath_langchain/_cli/_runtime/_context.py	Removes graph-related fields from runtime context

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[Copilot]

[nitpick] The stream mode list contains both 'messages' and 'updates' but the code only handles these two specific modes. Consider using a constant or enum to make the supported stream modes more explicit and maintainable.

[Copilot]

The parameter output_channels should have a type annotation that includes None since the method checks for None values implicitly through the isinstance checks, or add explicit None handling.

Suggested change

	def _extract_graph_result(self, final_chunk, output_channels: str | Sequence[str]):
	def _extract_graph_result(self, final_chunk, output_channels: Optional[str | Sequence[str]]):

[Copilot]

The AsyncResolver type alias is duplicated in both _runtime.py (line 26) and _graph_resolver.py (line 105). Consider defining it once in a shared location to avoid duplication.