perf: optimize authorization scoreline and workers

Tiku.Api/Middleware/DatabaseRequestMetricsMiddleware.cs

@@ -0,0 +1,12 @@
+using Tiku.Infrastructure.Observability;
+
+namespace Tiku.Api.Middleware;
+
+public sealed class DatabaseRequestMetricsMiddleware(RequestDelegate next)
+{
+    public async Task InvokeAsync(HttpContext context)
+    {
+        using var metrics = DatabaseRequestMetrics.Begin();
+        await next(context);
+    }
+}