📄️ addCustomMetadata
Add structured custom metadata to usernames using schema-based format for social profiles, contact info, and more
📄️ removeCustomMetadata
Remove a specific custom metadata entry by slot index with automatic array shifting
📄️ flushCustomMetadata
Delete all custom metadata entries in a single transaction with batch pricing
📄️ flushUsername
Permanently delete username and all data, making it available for re-registration