Bridge methods renamed; sandbox auth errors improved

Patch Changes

• 2c0a8aa: fix(harness): remove unused and unnecessary workingDirectory property from HarnessV1BootstrapCommand
• 861d423: feat(harness): improve harness sandbox auth error handling and expose getHarnessErrorMessage() helper
• 8f10600: fix(harness): rename harness bridge detach to stop and shutdown to destroy for clarity
  • ai@7.0.49