fix: forward callbacks/config through static-args tool wrapper

[edis-uipath]

Stacked on top of #921. Base branch is wrap-tools-in-static-args, so this diff shows only the hardening. Review/merge #921 first.

What

Addresses the Copilot review comment on #921 (discussion).

wrap_tool_with_static_args replaces a tool's coroutine/func with a **kwargs-only callable. StructuredTool._arun/_run (and BaseUiPathStructuredTool's override) decide whether to forward the child callbacks and the runnable config into the callable by inspecting its signature (signature(self.coroutine).parameters.get("callbacks") and _get_runnable_config_param(...)). A **kwargs-only wrapper hides those, so a wrapped tool that declares config/callbacks would stop receiving them.

Fix

• @functools.wraps(_coroutine) / @functools.wraps(_func) so inspect.signature sees through to the original callable — restoring LangChain's detection.
• New _runtime_passthrough_keys helper computes which keys LangChain injects (callbacks + the RunnableConfig-typed param) from the original signature.
• Those injected runtime kwargs are forwarded as-is, bypassing apply_static_args — whose sanitize_dict_for_serialization would otherwise mangle a live callback-manager / config object. Static-arg injection still applies only to the model-supplied args.

Impact / scope

No behavior change for any current tool: every wrapped coroutine today is **kwargs-only (integration / process / escalation / extraction / MCP / A2A) or reads config from the var_child_runnable_config contextvar (analyze_files), so _runtime_passthrough_keys is empty and the path is identical to before. This is forward-looking hardening so a future wrapped coroutine that declares config/callbacks keeps working.

Tests

New test_wrapper_forwards_config_and_callbacks_to_coroutine: a coroutine declaring config: RunnableConfig + callbacks, invoked via ainvoke, asserts the static value is injected and both config and callbacks arrive. (It errors without the functools.wraps fix, so it's a real guard.)

Verification: ruff check/format clean, mypy clean, pytest tests/agent/tools/ → 637 passed.

🤖 Generated with Claude Code

[Copilot]

Pull request overview

This PR hardens the static-args tool wrapper so LangChain can still detect and forward runtime-injected kwargs (callbacks and the RunnableConfig-typed param) after wrapping a tool’s coroutine/func.

Changes:

• Add functools.wraps around the wrapper callables so inspect.signature remains transparent to LangChain.
• Introduce _runtime_passthrough_keys() and ensure runtime-injected kwargs bypass apply_static_args.
• Add a regression test asserting config/callbacks reach a wrapped coroutine that explicitly declares them.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/uipath_langchain/agent/tools/static_args.py	Preserve callable signatures via wraps and forward runtime-injected kwargs outside static-arg merging.
tests/agent/tools/test_wrap_static_args.py	Add coverage ensuring wrapped tools still receive RunnableConfig and callbacks.