fix: when create provider credential set the provider record to vaild (#26868)

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

api/core/entities/provider_configuration.py

@@ -472,6 +472,9 @@ class ProviderConfiguration(BaseModel):
                     provider_model_credentials_cache.delete()
 
                     self.switch_preferred_provider_type(provider_type=ProviderType.CUSTOM, session=session)
+                else:
+                    # some historical data may have a provider record but not be set as valid
+                    provider_record.is_valid = True
 
                 session.commit()
             except Exception: