feat: add Ling-3.0-flash vLLM service for Dankclaw (frank-default-large, port 7770)

- serve-ling3-vllm.sh: wrapper around jcbtc validated run-256k.sh (TRITON_MLA,
  MTP K1, 256k, 6 slots, ROCr idle-fix LD_PRELOAD); sets HOST/PORT/
  SERVED_MODEL_NAME=frank-default-large
- frank-default-large.service: systemd unit, User=dank, port 7770

scripts/frank-default-large.service

@@ -0,0 +1,18 @@
+[Unit]
+Description=vLLM Ling-3.0-flash INT4 (CIRU gfx1151) -- frank-default-large
+After=network.target
+
+[Service]
+Type=simple
+User=dank
+Group=dank
+WorkingDirectory=/home/dank/ling3-ciru/Ling-3.0-Flash-CIRU-int4-Strix-native
+Environment="HOST=0.0.0.0"
+Environment="PORT=7770"
+Environment="SERVED_MODEL_NAME=frank-default-large"
+ExecStart=/home/dank/vllmScripts/scripts/serve-ling3-vllm.sh
+Restart=on-failure
+RestartSec=10
+
+[Install]
+WantedBy=multi-user.target