chore: bump uipath-langchain to 0.11.19 and regenerate uv.lock

Rebased onto main (now 0.11.18) and bumped to 0.11.19 for the mcp 1.27.2 upgrade.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: edis-uipath

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "uipath-langchain"
-version = "0.11.18"
+version = "0.11.19"
 description = "Python SDK that enables developers to build and deploy LangGraph agents to the UiPath Cloud Platform"
 readme = { file = "README.md", content-type = "text/markdown" }
 requires-python = ">=3.11"