Fix domain record creation during site creation/duplication

[marcusquinn]

Fix Domain Record Creation and Add DNS Check Interval Setting

Description

This PR addresses two related issues with domain management:

1. Fixes an issue where domain records are not being created automatically when a site is created or duplicated. This is particularly important for the Closte.com integration, as the domain record creation triggers the Closte API to create the domain and SSL certificate.

2. Adds a configurable setting for the DNS and SSL certificate checking interval. Previously, this interval was hardcoded to 5 minutes (300 seconds), which was too long for practical use during site setup and testing.

Changes Made

Domain Record Creation Fix

• Added a create_domain_record_for_site method to the Domain_Manager class that creates a domain record for a site if one doesn't already exist
• Modified the handle_site_created method to call the new method for both subdomain and non-subdomain sites
• Added a hook to the Site model's save method to ensure domain records are created when sites are created through the WP Ultimo interface
• Added a hook to the Domain_Manager class to handle the wu_initialize_site action

DNS Check Interval Setting

• Added a new setting field dns_check_interval to the domain mapping settings section
• Modified the async_process_domain_stage method to use the new setting value instead of the hardcoded 5 minutes
• Added validation to ensure the value is between 10 and 300 seconds
• Updated the scheduling to use seconds instead of minutes for more precise control
• Updated log messages to reflect the change from minutes to seconds

Settings Details

• Default value: 300 seconds (5 minutes)
• Minimum value: 10 seconds
• Maximum value: 300 seconds (5 minutes)
• Setting is accessible in the Domain Mapping settings section

Testing

These changes have been tested to ensure that:

• Domain records are created automatically when a site is created or duplicated
• The Closte.com integration is triggered when a domain record is created
• The DNS and SSL certificate checks use the configured interval
• The interval is properly validated to be within the allowed range

Related Issues

• Fixes the issue where site creation/duplication doesn't create domain records
• Addresses the request for a configurable DNS checking interval setting

[superdav42]

I removed some redundant code. This is G2G now.