Initial commit — DRB client (edge node) stack

Includes edge-node (FastAPI/MQTT/Discord voice), op25-container (SDR decoder),
and icecast (audio streaming).

drb-edge-node/app/internal/logger.py

@@ -0,0 +1,10 @@
+import logging
+import sys
+
+logging.basicConfig(
+    level=logging.INFO,
+    format="%(asctime)s [%(levelname)s] %(name)s: %(message)s",
+    handlers=[logging.StreamHandler(sys.stdout)],
+)
+
+logger = logging.getLogger("drb-edge-node")