feat(core): add content-block-centric streaming (v2) (#36834)

libs/core/pyproject.toml

@@ -32,6 +32,7 @@ dependencies = [
     "packaging>=23.2.0",
     "pydantic>=2.7.4,<3.0.0",
     "uuid-utils>=0.12.0,<1.0",
+    "langchain-protocol>=0.0.10",
 ]
 
 [project.urls]
@@ -93,7 +94,6 @@ enable_error_code = "deprecated"
 # TODO: activate for 'strict' checking
 disallow_any_generics = false
 
-
 [tool.ruff.format]
 docstring-code-format = true