Init Cloudzero Settings

Initialize CloudZero settings and store in the database.

This endpoint stores the CloudZero API key, connection ID, and timezone configuration in the proxy database for use by the CloudZero logger.

Parameters:

• api_key: CloudZero API key for authentication
• connection_id: CloudZero connection ID for data submission
• timezone: Timezone for date handling (default: UTC)

Only admin users can configure CloudZero settings.