feat: send logs to UI

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

ref: N25B-242

src/control_backend/api/v1/router.py

@@ -1,6 +1,6 @@
 from fastapi.routing import APIRouter
 
-from control_backend.api.v1.endpoints import command, message, sse
+from control_backend.api.v1.endpoints import command, logs, message, sse
 
 api_router = APIRouter()
 
@@ -9,3 +9,5 @@ api_router.include_router(message.router, tags=["Messages"])
 api_router.include_router(sse.router, tags=["SSE"])
 
 api_router.include_router(command.router, tags=["Commands"])
+
+api_router.include_router(logs.router, tags=["Logs"])