fix(testkit): macOS compat + fix test 8c ordering (#24)

artifacts/api-server/src/middlewares/response-time.ts

@@ -0,0 +1,31 @@
+import type { Request, Response, NextFunction } from "express";
+import { makeLogger } from "../lib/logger.js";
+import { latencyHistogram } from "../lib/histogram.js";
+
+const logger = makeLogger("http");
+
+export function responseTimeMiddleware(req: Request, res: Response, next: NextFunction): void {
+  const startedAt = Date.now();
+
+  res.on("finish", () => {
+    const durationMs = Date.now() - startedAt;
+    const route = req.route?.path as string | undefined;
+    const routeKey = `${req.method} ${route ?? req.path}`;
+
+    latencyHistogram.record(routeKey, durationMs);
+
+    logger.info("request", {
+      method:      req.method,
+      path:        req.path,
+      route:       route ?? null,
+      status:      res.statusCode,
+      duration_ms: durationMs,
+      ip:
+        (req.headers["x-forwarded-for"] as string | undefined)?.split(",")[0]?.trim() ??
+        req.socket.remoteAddress ??
+        null,
+    });
+  });
+
+  next();
+}