bug: fix check for server ready when using 0.0.0.0 as host (#9002)

* Fix check for server ready when using 0.0.0.0 as host

* [autofix.ci] apply automated fixes

* [autofix.ci] apply automated fixes (attempt 2/3)

* fix: add noqa comment to health check host assignment for clarity

---------

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: Gabriel Luiz Freitas Almeida <gabriel@langflow.org>

src/backend/base/langflow/__main__.py

@@ -147,11 +147,15 @@ def set_var_for_macos_issue() -> None:
 
 def wait_for_server_ready(host, port, protocol) -> None:
     """Wait for the server to become ready by polling the health endpoint."""
+    # Use localhost for health check when host is 0.0.0.0 (bind to all interfaces)
+    health_check_host = "localhost" if host == "0.0.0.0" else host  # noqa: S104
+
     status_code = 0
     while status_code != httpx.codes.OK:
         try:
             status_code = httpx.get(
-                f"{protocol}://{host}:{port}/health", verify=host not in ("127.0.0.1", "localhost")
+                f"{protocol}://{health_check_host}:{port}/health",
+                verify=health_check_host not in ("127.0.0.1", "localhost"),
             ).status_code
         except HTTPError:
             time.sleep(1)