added validatePath to markAsCompleted to reflect changes on updated data

[Dhaneshwarguiyan]

PR Fixes:

• 1 Added validatePath to markAsCompleted
• 2 MarkAsCompleted reflects updated changes on sidebar and Content Card

Resolves #1794

Checklist before requesting a review

• [x] I have performed a self-review of my code
• [x] I assure there is no similar/duplicate pull request regarding same issue Screencast from 27-03-25 07:06:33 PM IST.webm