fix: merge all process stderr to stdout for full HF log visibility

supervisord.conf

@@ -1,19 +1,22 @@
 [supervisord]
 nodaemon=true
 user=appuser
-logfile=/tmp/supervisord.log
+logfile=/dev/null
+logfile_maxbytes=0
 pidfile=/tmp/supervisord.pid
+# Print supervisord's own events to stdout
+loglevel=info
 
 [program:backend]
-command=uvicorn main:app --host 127.0.0.1 --port 8000 --workers 1
+command=uvicorn main:app --host 127.0.0.1 --port 8000 --workers 1 --log-level info
 directory=/app/backend
 autostart=true
 autorestart=true
 stdout_logfile=/dev/stdout
 stdout_logfile_maxbytes=0
-stderr_logfile=/dev/stderr
+stderr_logfile=/dev/stdout
 stderr_logfile_maxbytes=0
-environment=PYTHONUNBUFFERED="1"
+environment=PYTHONUNBUFFERED="1",PYTHONDONTWRITEBYTECODE="1"
 
 [program:frontend]
 command=node server.js
@@ -22,20 +25,23 @@ autostart=true
 autorestart=true
 stdout_logfile=/dev/stdout
 stdout_logfile_maxbytes=0
-stderr_logfile=/dev/stderr
+stderr_logfile=/dev/stdout
 stderr_logfile_maxbytes=0
 environment=NODE_ENV="production",PORT="3000",HOSTNAME="127.0.0.1"
 
 [program:worker]
+; --loglevel=info prints every task received/succeeded/failed/retry
+; --without-* flags disable gossip chatter to save Redis connections
+; stderr is merged INTO stdout so HF console shows everything in one stream
 command=celery -A src.workers.celery_app.celery_app worker --loglevel=info --concurrency=1 --pool=solo --without-mingle --without-gossip --without-heartbeat
 directory=/app/backend
 autostart=true
 autorestart=true
 stdout_logfile=/dev/stdout
 stdout_logfile_maxbytes=0
-stderr_logfile=/dev/stderr
+stderr_logfile=/dev/stdout
 stderr_logfile_maxbytes=0
-environment=PYTHONUNBUFFERED="1"
+environment=PYTHONUNBUFFERED="1",PYTHONDONTWRITEBYTECODE="1",PYTHONIOENCODING="utf-8"
 
 [program:nginx]
 command=nginx -c /app/nginx.conf -g "daemon off;"
@@ -43,5 +49,5 @@ autostart=true
 autorestart=true
 stdout_logfile=/dev/stdout
 stdout_logfile_maxbytes=0
-stderr_logfile=/dev/stderr
+stderr_logfile=/dev/stdout
 stderr_logfile_maxbytes=0