Introduces wp_schedule_bulk_events to allow scheduling multiple cron events at once. This function optimizes bulk scheduling by batching updates to the cron option and includes error handling for concurrent modifications.

Reformatted the wp_schedule_bulk_events function to use consistent spacing and array initialization style, improving code readability and maintaining coding standards. No functional changes were made.

Standardizes function and closure formatting in wp_schedule_bulk_events for consistency. Also reorders a comparison to check the current cron option value against the original, improving code clarity.

Standardized spacing in anonymous function definitions and function calls within wp_schedule_bulk_events for better readability and consistency.

Cleaned up the default array parameter in get_option by removing an unnecessary space for consistency and code style.

Separated the assignment of $orig_value and $bulk_value to improve code clarity in wp_schedule_bulk_events. This change ensures $orig_value and $bulk_value are independently assigned, avoiding potential confusion.

Replaces the arrow function in array_reduce with an anonymous function for compatibility and clarity when checking if all arguments are arrays.

Improves readability by reformatting the array_reduce call in wp_schedule_bulk_events to use multi-line syntax.

Removed unnecessary whitespace after the opening parenthesis in the array_reduce call for improved code style consistency.

Updated error codes in wp_schedule_bulk_events to be more specific: 'wp_schedule_bulk_events_verify_failed' for verification failures and 'wp_schedule_bulk_events_update_failed' for update failures. This improves error clarity and debugging.

Added a check to ensure wp_schedule_single_event is only called if the event is not already scheduled. This prevents duplicate cron events from being created for the same hook and arguments.