Add the following company settings

• Renewal Attempt Spacing Threshold 1 (The number of service renewals to attempt before delaying Spacing attempts Renewal Attempt Spacing 1 hours apart)
• Renewal Attempt Spacing 1 [Selector with --none-- and hours 1-72]
• Renewal Attempt Spacing Threshold 2 (The number of service renewals to attempt before delaying Spacing attempts Renewal Attempt Spacing 2 hours apart)
• Renewal Attempt Spacing 2 [Selector with --none-- and hours 1-72]

Add a column to service_invoices called date_next_attempt DATETIME NULL DEFAULT NULL

When a service renewal fails:

1. If the post increment value of failed_attempts is greater than renewal_attempt_threshold_2, then set the date_next_attempt for this record to the current datetime + renewal_attempt_spacing_2 hours
2. Else if the post increment value of failed_attempts is greater than renewal_attempt_threshold_1, then set the date_next_attempt for this record to the current datetime + renewal_attempt_spacing_1 hours

Add a column to the page under Tools > Renewal Queue for Next Attempt Date which displays "Next Cron Run" for records with a date_next_attempt of null.

Update getAllRenewablePaid() to only get records with date_next_attempt === null or date_next_attempt < current date