The Velocity Analysis report now labels the metric as "Average Days in Stage" instead of "Days in Stage." This makes it clearer that the report shows an average duration, helping users interpret recruitment pipeline timing more accurately.

Rename the metric on the Velocity Analysis report from `Days in Stage` to `Average Days in Stage` to clarify the data presented.

task-4756951

Subscription invoice checks were updated to match the new invoicing behavior: section or note lines without any product are no longer added to invoices. This helps keep subscription invoices cleaner and aligned with the standard sales flow.

Sections with notes but no product are not added to invoices anymore.

task-4614770