Refactor project files for improved readability and structure

- Cleaned up whitespace in Directory.Build.props and Directory.Packages.props for consistency.
- Reformatted project file references in PnvPanel.Api.csproj for better clarity.
- Enhanced code readability in various endpoint files by adjusting line breaks and indentation.
- Standardized method signatures and improved formatting in ResultExtensions and multiple endpoint classes for better maintainability.

backend/src/PnvPanel.Infrastructure/BackgroundJobs/NodeHealthCheckService.cs

@@ -8,7 +8,10 @@ using PnvPanel.Infrastructure.Persistence;
 
 namespace PnvPanel.Infrastructure.BackgroundJobs;
 
-public sealed class NodeHealthCheckService(IServiceScopeFactory scopeFactory, ILogger<NodeHealthCheckService> logger) : BackgroundService
+public sealed class NodeHealthCheckService(
+    IServiceScopeFactory scopeFactory,
+    ILogger<NodeHealthCheckService> logger
+) : BackgroundService
 {
     private static readonly TimeSpan Interval = TimeSpan.FromMinutes(2);
 
@@ -25,8 +28,7 @@ public sealed class NodeHealthCheckService(IServiceScopeFactory scopeFactory, IL
             {
                 logger.LogError(ex, "Node health-check failed");
             }
-        }
-        while (await timer.WaitForNextTickAsync(stoppingToken));
+        } while (await timer.WaitForNextTickAsync(stoppingToken));
     }
 
     private async Task CheckAllAsync(CancellationToken cancellationToken)
@@ -46,7 +48,12 @@ public sealed class NodeHealthCheckService(IServiceScopeFactory scopeFactory, IL
             if (node.Status != newStatus)
             {
                 node.UpdateStatus(newStatus);
-                await notifier.NotifyNodeStatusChangedAsync(node.Id, newStatus, node.LastSyncAt, cancellationToken);
+                await notifier.NotifyNodeStatusChangedAsync(
+                    node.Id,
+                    newStatus,
+                    node.LastSyncAt,
+                    cancellationToken
+                );
             }
         }