feat: add tracing enrichment and prometheus exporter

src/Core/TakeoutSaaS.Shared.Web/Middleware/RequestLoggingMiddleware.cs

@@ -23,13 +23,15 @@ public sealed class RequestLoggingMiddleware(RequestDelegate next, ILogger<Reque
         {
             stopwatch.Stop();
             var traceId = TraceContext.TraceId ?? context.TraceIdentifier;
+            var spanId = TraceContext.SpanId ?? Activity.Current?.SpanId.ToString() ?? string.Empty;
             logger.LogInformation(
-                "HTTP {Method} {Path} => {StatusCode} ({Elapsed} ms) TraceId:{TraceId}",
+                "HTTP {Method} {Path} => {StatusCode} ({Elapsed} ms) TraceId:{TraceId} SpanId:{SpanId}",
                 context.Request.Method,
                 context.Request.Path,
                 context.Response.StatusCode,
                 stopwatch.Elapsed.TotalMilliseconds,
-                traceId);
+                traceId,
+                spanId);
         }
     }
 }