V109: Rename Customer Service module settings keys and permission module_key to customer_support.

The customer_service module has been renamed to customer_support. This migration renames all associated settings keys and role permission module_key values to match the new module identity.

Changes

• Rename 7 settings keys from customer_service_* → customer_support_*
• Rename auto-granted permission key from auto_granted_perm:customer_service → auto_granted_perm:customer_support
• Rename role permission module_key from customer_service → customer_support

All operations are idempotent.