fix(minecraft_auth): preserve active state when updating existing acc…

[lulkebit]

• Fixes multi-account launches always using the previously refreshed credentials.
• update_or_insert now keeps the persisted active flag when refreshing stored credentials, preventing background token refreshes from silently reactivating another account.
• Result: launching profile B after switching accounts reliably uses the chosen credentials without needing another in-client switch.

[copyandexecute]

wow, thanks for pr! will check