fix(tools): use modified messages list in async compaction

The async `_check_and_compact()` method was incorrectly using
`self._params["messages"]` instead of the local `messages` variable
when building the compaction request.

This caused the async version to ignore all the filtering logic that
removes tool_use blocks from the last assistant message before
compaction, potentially sending invalid API requests.

The sync version correctly uses `*messages` (line 203), while the
async version was using `*self._params["messages"]` (line 454).

Author: fede-kamel

src/anthropic/lib/tools/_beta_runner.py

@@ -451,7 +451,7 @@ async def _check_and_compact(self) -> bool:
                 messages.pop()
 
         messages = [
-            *self._params["messages"],
+            *messages,
             BetaMessageParam(
                 role="user",
                 content=self._compaction_control.get("summary_prompt", DEFAULT_SUMMARY_PROMPT),