The DevIndex Updater currently stores the full LinkedIn URL (e.g., "https://www.linkedin.com/in/leecalcote/") in the li field. To reduce file size and optimize data storage, we should only store the LinkedIn username (e.g., "leecalcote").

Tasks:

1. Update fetchUserData in apps/devindex/services/Updater.mjs to extract and store only the username from the LinkedIn URL.
2. Ensure the IconLink column renderer in GridContainer.mjs reconstructs the full URL.