Update Token Usage Logic and Add Design Assistant Token Usage Tracking

[Thenujan-Nagaratnam]

Description

Test the fixes introduced in the PR:
Introduce fixes for the common orgID claim issue

This includes the following additional changes:

• Updated token usage tracking to use handle instead of orgID
• Added support for tracking token usage for the Design Assistant
• Updated Redis to use keys prefixed with key: for consistency
• Implemented bulk deletion of data across all tenants for a given organization

Version

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