Add discord_test_send script for debugging webhook functionality

discord_test_send.py

@@ -0,0 +1,16 @@
+import ujson
+# Reload discord module fresh and run the forced debug send once.
+try:
+    # ensure we use latest module on device
+    import sys
+    if "scripts.discord_webhook" in sys.modules:
+        del sys.modules["scripts.discord_webhook"]
+    import scripts.discord_webhook as d
+    # load config.json to populate webhook URL
+    with open("config.json", "r") as f:
+        cfg = ujson.load(f)
+    d.set_config(cfg)
+    print("Running debug_force_send() — may trigger ENOMEM, run once only")
+    d.debug_force_send("memory test")
+except Exception as e:
+    print("test_send error:", e)