VM 网络完全中断 - 所有扩展均失效

VM Details:
- Name: meinan
- Resource Group: YJT_group
- Subscription: f1bdd072-6648-4728-9e01-eec5a85a9082
- OS: Windows Server 2016

Problem: All 7 VM extensions failed with error "VM has not reported status for VM agent or extensions. Verify that the OS is up and healthy, the VM has a running VM agent, and that it can establish outbound connections to Azure storage."

Error Details:
- AdminCenter: Failed
- AzureMonitorWindowsAgent: Failed
- AzureNetworkWatcherExtension: Failed
- AzurePerformanceDiagnostics: Failed
- HealthExtension: Failed
- MDE.Windows: Failed
- WindowsPatchExtension: Failed

Impact: Production environment completely unavailable