## Description
Fix the flashing validator on the provider setting page which is unable
to read and interface. Now it is stable to show the status of the
provider and help users to do the further config.
## Linked Issues
#2301
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Bug Fixes**
* Improved credential validation stability by preventing repeated
validation for equivalent credential values.
* Preserved debounced validation behavior and manual test state resets.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
AdairLi