add subscriber debug script

Author: saschatommasone

plugins/helix/scripts/requirements.txt

@@ -0,0 +1,2 @@
+redis
+protobuf

plugins/helix/scripts/subscriber.py

@@ -0,0 +1,33 @@
+import sys
+import redis
+
+try:
+    import helix_pb2 as hx
+except ImportError:
+    sys.stderr.write("Error: Missing generated Python code. Please compile 'helix.proto' using 'protoc' before running this script.\n")
+    sys.exit(1)
+
+
+CHANNELS: list[str] = ["hal", "application1", "application2"]
+
+
+def main() -> None:
+    client: redis.Redis = redis.Redis(host='localhost', port=6379, db=0)
+    pubsub: redis.client.PubSub = client.pubsub()
+
+    for channel in CHANNELS:
+        pubsub.subscribe(channel)
+        print(f"Subscribed to '{channel}'")
+    print()
+
+    for msg in pubsub.listen():
+        if msg.get("type") != "message":
+            continue
+
+        message: hx.Message = hx.Message()
+        message.ParseFromString(msg.get("data"))
+        print(f"{message}")
+
+
+if __name__ == "__main__":
+    main()