- Add `allow_fallback` parameter to `register_openai_account_auto()` to control fallback behavior
- Return `"retry_new_email"` status when API registration fails without fallback enabled
- Return `"domain_blacklisted"` status when domain is blacklisted during registration
- Update `register_only()` to handle and propagate `"retry_new_email"` status
- Update `register_and_authorize()` to handle and propagate `"retry_new_email"` status
- Add retry logic in `process_accounts()` to regenerate email and reinvite on API failures
- Add retry logic in `_process_single_account_worker()` to regenerate email and reinvite on API failures
- Improve error handling to distinguish between domain blacklist and API failures requiring email regeneration
- Add automatic email retry logic when verification code times out (5-second timeout)
- Implement new email creation and team invitation for failed verification attempts
- Add max_email_retries parameter to control retry attempts (default: 3)
- Add team_name parameter to enable automatic team invitations for new emails
- Return special "new_email:xxx@xxx.com:password" format when new email is used
- Update register_openai_account_auto() to support team_name parameter
- Update register_and_authorize() to support team_name parameter and return new email info
- Improve verification code timeout handling with configurable retry intervals
- Add nonlocal verification_timeout flag to track timeout state across retries
- Update docstrings to document new parameters and return value changes
