Diagnóstico y fix SQL Server: SERVERNAME, TDS_Version, Puerto explicitos

deploy/dashboard-leads-backend.service

@@ -0,0 +1,14 @@
+[Unit]
+Description=Dashboard Leads Backend Service (FastAPI)
+After=network.target
+
+[Service]
+User=ubuntu
+WorkingDirectory=/var/www/dashboard-leads/backend
+ExecStart=/var/www/dashboard-leads/backend/venv/bin/uvicorn main:app --host 127.0.0.1 --port 8001 --workers 2
+Restart=always
+RestartSec=5
+EnvironmentFile=/var/www/dashboard-leads/backend/.env
+
+[Install]
+WantedBy=multi-user.target