fix: detach utf8_stdout before closing handler to preserve shared buffer

Move the utf8_stdout detach before log_handler.close() so the wrapper is
disconnected from sys.stdout.buffer before StreamHandler.close() can
cascade a close through it.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: cristipufu

src/uipath/runtime/logging/_interceptor.py

@@ -233,13 +233,13 @@ def teardown(self) -> None:
                 if handler not in self.root_logger.handlers:
                     self.root_logger.addHandler(handler)
 
-        if self._owns_handler:
-            self.log_handler.close()
-
         if hasattr(self, "utf8_stdout"):
             self.utf8_stdout.detach()
             del self.utf8_stdout
 
+        if self._owns_handler:
+            self.log_handler.close()
+
         # Only restore streams if we redirected them
         if self.original_stdout and self.original_stderr:
             sys.stdout = self.original_stdout