Add Internal Notes Feature to Individual Change Orders

Description:Currently, notes can only be added at the project level under "Overview > Notes" tab. This requires referencing change orders indirectly and doesn't provide dedicated space for CO-specific communication.

Requested Feature:Add the ability to attach internal notes directly to individual change orders, similar to how purchase orders allow internal notes even after status changes.

Use Case:Project managers and engineers need a dedicated space within each change order to:

• Track CO-specific requirements and decisions

• Communicate about individual CO progress

• Document internal discussions related to that specific change order

• Use @mentions for CO-specific notifications

Benefits:

• Centralized communication per change order

• Better organization than project-level notes

• Improved coordination between team members on specific COs

• Maintains context when reviewing individual change orders