build(deps): bump langsmith to 0.8.0 across uv lockfiles

Bumps the langsmith pin in py/pyproject.toml's lint group from 0.7.31
to 0.8.0 and regenerates py/uv.lock and integrations/adk-py/uv.lock so
no resolution can pick up a sub-0.8.0 langsmith.

integrations/langchain-py/uv.lock was already at 0.8.0 (#433).

py/uv.lock relock also picked up unrelated drift the existing lockfile
had against pyproject.toml's open ranges (pydantic-ai 1.66 -> 1.94 and
friends, litellm 1.84.0 added, pydantic-handlebars 0.1.0 added, etc.).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: starfolkbot

integrations/adk-py/uv.lock

@@ -220,7 +220,7 @@ lint = [
     "temporalio",
     "pydantic-ai>=1.10.0",
     "opentelemetry-instrumentation-openai==0.59.1",
-    "langsmith==0.7.31",
+    "langsmith==0.8.0",
     "langchain-core",
     "langchain-openai",
     "langchain-anthropic",