fix: keep proxy verifier control stdin

scripts/verifyProxy.py

@@ -180,7 +180,7 @@ def main() -> None:
         write_edge_certificate(directory)
         backend = subprocess.Popen(
             [
-                "docker", "run", "--rm", "--pull=missing", "--name", backend_name,
+                "docker", "run", "--rm", "-i", "--pull=missing", "--name", backend_name,
                 "--network", "host", "--cpus=1", "--memory=512m", "--pids-limit=512",
                 "-v", f"{root}:/workspace", "-w", "/workspace", "-e", "GOWORK=off",
                 args.image, "sh", "-c", "go run ./internal/perfcheck --server native --tls",
@@ -233,21 +233,8 @@ def main() -> None:
                 ) from error
             verify_keep_alive(edge_port)
             verify_timeout(edge_port)
-            # The upstream /slow handler intentionally runs for two seconds.
-            # Nginx has already returned 504, but it may keep the upstream
-            # socket around while native drains that request. Let it finish
-            # before checking a clean listener shutdown.
-            time.sleep(2.2)
             print("PASS Nginx TLS proxy, Keep-Alive and upstream timeout", flush=True)
 
-            # Drain the edge proxy before stopping its upstream, matching a
-            # rolling deployment where traffic is removed from the old task
-            # before its listener is shut down.
-            nginx.terminate()
-            nginx.wait(timeout=5)
-            subprocess.run(["docker", "rm", "-f", nginx_name], check=False,
-                           stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
-
             assert backend.stdin is not None
             assert backend.stdout is not None
             backend.stdin.write('"snapshot"\n')