Function batch_set_field 

pub fn batch_set_field(
    queue: &mut QueueFile,
    task_ids: &[String],
    key: &str,
    value: &str,
    now_rfc3339: &str,
    continue_on_error: bool,
) -> Result<BatchOperationResult>

Batch set custom field for multiple tasks.

Arguments

• queue - The queue file to modify
• task_ids - List of task IDs to update
• key - The custom field key
• value - The custom field value
• now_rfc3339 - Current timestamp for updated_at
• continue_on_error - If true, continue processing on individual failures

Returns

A BatchOperationResult with details of successes and failures.