log-search: Prevent BrokenPipeError exceptions when run with head.

See https://docs.python.org/3/library/signal.html#note-on-sigpipe

scripts/log-search

@@ -226,6 +226,12 @@ def main() -> None:
                             filter_types=filter_types,
                             use_color=use_color,
                         )
+    except BrokenPipeError:
+        # Python flushes standard streams on exit; redirect remaining output
+        # to devnull to avoid another BrokenPipeError at shutdown
+        devnull = os.open(os.devnull, os.O_WRONLY)
+        os.dup2(devnull, sys.stdout.fileno())
+        sys.exit(1)
     except KeyboardInterrupt:
         sys.exit(signal.SIGINT + 128)