Refactor code structure for improved readability and maintainability; optimize performance in key functions.

src/Gateway/StellaOps.Gateway.WebService/Middleware/TenantMiddleware.cs

@@ -0,0 +1,40 @@
+using System.Security.Claims;
+
+namespace StellaOps.Gateway.WebService.Middleware;
+
+public sealed class TenantMiddleware
+{
+    private readonly RequestDelegate _next;
+    private readonly ILogger<TenantMiddleware> _logger;
+
+    public TenantMiddleware(RequestDelegate next, ILogger<TenantMiddleware> logger)
+    {
+        _next = next;
+        _logger = logger;
+    }
+
+    public async Task InvokeAsync(HttpContext context)
+    {
+        if (GatewayRoutes.IsSystemPath(context.Request.Path))
+        {
+            await _next(context);
+            return;
+        }
+
+        var tenantId = context.User.FindFirstValue("tid");
+        if (!string.IsNullOrWhiteSpace(tenantId))
+        {
+            context.Items[GatewayContextKeys.TenantId] = tenantId;
+            if (!context.Request.Headers.ContainsKey("tid"))
+            {
+                context.Request.Headers["tid"] = tenantId;
+            }
+        }
+        else
+        {
+            _logger.LogDebug("No tenant claim found on request {TraceId}", context.TraceIdentifier);
+        }
+
+        await _next(context);
+    }
+}