Display Change Plan Schedule in Customer Portal

Description:
The customer portal currently does not show scheduled change plans, limiting customer visibility into upcoming changes and maintenance.

Expected Behavior:
Display upcoming change plans in the customer portal, including the change details, scheduled date/time, status, and expected impact. The information should reflect the latest schedule.

Use Case:
A customer logs into the portal to view upcoming changes to their services and plan accordingly.

Impact:
Improves customer visibility and transparency while reducing dependency on support for change schedule information.