feat(cloud): add flush endpoint for non-Active-Active databases

[joshrotenberg]

Summary

Add support for flushing non-Active-Active (standard) Pro databases.

Current state

We have:

• cloud database flush-crdb - Flush Active-Active database

Missing

• PUT /subscriptions/{subscriptionId}/databases/{databaseId}/flush - Flush standard database

Implementation

CLI

Add cloud database flush <subscription_id:database_id> command

Consider:

• Rename existing flush-crdb to flush-aa for consistency
• Or use a single flush command with --active-active flag

Notes

• Destructive operation - should require confirmation
• May need --force flag to skip confirmation

[joshrotenberg]

Already implemented. Both cloud database flush and cloud database flush-crdb commands exist.