fix: endpoints don't create sockets

ref: N25B-217

src/control_backend/api/v1/endpoints/command.py

@@ -17,8 +17,7 @@ async def receive_command(command: SpeechCommand, request: Request):
     # Validate and retrieve data.
     SpeechCommand.model_validate(command)
     topic = b"command"
-    pub_socket = Context.instance().socket(zmq.PUB)
-    pub_socket.connect(settings.zmq_settings.internal_pub_address)
+    pub_socket = request.app.state.endpoints_pub_socket
     await pub_socket.send_multipart([topic, command.model_dump_json().encode()])
 
     return {"status": "Command received"}

src/control_backend/api/v1/endpoints/message.py

@@ -1,10 +1,7 @@
 import logging
 
-import zmq
 from fastapi import APIRouter, Request
-from zmq.asyncio import Context
 
-from control_backend.core.config import settings
 from control_backend.schemas.message import Message
 
 logger = logging.getLogger(__name__)
@@ -19,8 +16,7 @@ async def receive_message(message: Message, request: Request):
     topic = b"message"
     body = message.model_dump_json().encode("utf-8")
 
-    pub_socket = Context.instance().socket(zmq.PUB)
-    pub_socket.bind(settings.zmq_settings.internal_pub_address)
+    pub_socket = request.app.state.endpoints_pub_socket
     await pub_socket.send_multipart([topic, body])
 
     return {"status": "Message received"}

src/control_backend/main.py

@@ -28,14 +28,14 @@ def setup_sockets():
     context = Context.instance()
 
     internal_pub_socket = context.socket(zmq.XPUB)
-    internal_pub_socket.bind(settings.zmq_settings.internal_pub_address)
+    internal_pub_socket.bind(settings.zmq_settings.internal_sub_address)
     logger.debug("Internal publishing socket bound to %s", internal_pub_socket)
 
     internal_sub_socket = context.socket(zmq.XSUB)
-    internal_sub_socket.bind(settings.zmq_settings.internal_sub_address)
+    internal_sub_socket.bind(settings.zmq_settings.internal_pub_address)
     logger.debug("Internal subscribing socket bound to %s", internal_sub_socket)
     try:
-        zmq.proxy(internal_pub_socket, internal_sub_socket)
+        zmq.proxy(internal_sub_socket, internal_pub_socket)
     except zmq.ZMQError:
         logger.warning("Error while handling PUB/SUB proxy. Closing sockets.")
     finally:
@@ -51,6 +51,12 @@ async def lifespan(app: FastAPI):
     proxy_thread.daemon = True
     proxy_thread.start()
 
+    context = Context.instance()
+
+    endpoints_pub_socket = context.socket(zmq.PUB)
+    endpoints_pub_socket.connect(settings.zmq_settings.internal_pub_address)
+    app.state.endpoints_pub_socket = endpoints_pub_socket
+
     # Initiate agents
     ri_communication_agent = RICommunicationAgent(
         settings.agent_settings.ri_communication_agent_name + "@" + settings.agent_settings.host,