Fix runTool helper in calendar tests to match execute() arity

src/tools/calendar.test.ts

@@ -357,7 +357,13 @@ function memoryStore(initial: string | null): GoogleTokenStore & { current: stri
 }
 
 async function runTool(tool: ReturnType<typeof createCalendarTool>, params: unknown): Promise<string> {
-  const res = await tool.execute("tc-1", params as never);
+  const res = await tool.execute(
+    "tc-1",
+    params as never,
+    undefined as never,
+    undefined as never,
+    undefined as never,
+  );
   return (res.content[0] as { text: string }).text;
 }