feat: send logs to UI

Added SSE endpoint `/logs/stream` for the UI to listen to logs.

ref: N25B-242

src/control_backend/logging/setup_logging.py

@@ -3,6 +3,9 @@ import logging.config
 import os
 
 import yaml
+import zmq
+
+from control_backend.core.config import settings
 
 
 def add_logging_level(level_name: str, level_num: int, method_name: str | None = None) -> None:
@@ -38,13 +41,19 @@ def setup_logging(path: str = ".logging_config.yaml") -> None:
         with open(path) as f:
             try:
                 config = yaml.safe_load(f.read())
-
-                if "custom_levels" in config:
-                    for level_name, level_num in config["custom_levels"].items():
-                        add_logging_level(level_name, level_num)
-
-                    logging.config.dictConfig(config)
             except (AttributeError, yaml.YAMLError) as e:
                 logging.warning(f"Could not load logging configuration: {e}")
+                config = {}
+
+            if "custom_levels" in config:
+                for level_name, level_num in config["custom_levels"].items():
+                    add_logging_level(level_name, level_num)
+
+            if config.get("handlers") is not None and config.get("handlers").get("ui"):
+                pub_socket = zmq.Context.instance().socket(zmq.PUB)
+                pub_socket.connect(settings.zmq_settings.internal_pub_address)
+                config["handlers"]["ui"]["interface_or_socket"] = pub_socket
+            logging.config.dictConfig(config)
+
     else:
         logging.warning("Logging config file not found. Using default logging configuration.")