Problem

Currently, users working with multi-subscription Azure environments must manually:

Enumerate each subscription individually
Run cloudlist multiple times with different subscription IDs
Manage results from separate operations

Solution

This PR (#663) enables cloudlist to automatically discover all Azure subscriptions the user/app has permissions for when no subscription_id is specified, allowing:

Single-operation scanning across all accessible subscriptions
Consistent resource discovery without manual subscription enumeration
Improved workflow for organisations with Azure tenancies with multiple subscriptions