feat(ana-ml2): replace Qwen3.5-9B vision with Qwen3.6-35B-A3B FP8 on GPU 1

Retire qwen35-vl (Qwen3.5-9B); add qwen36-vl serving the official FP8
Qwen3.6-35B-A3B vision MoE on :8007 under its TRUE name only — no alias.
qwen3.5-9b-fp8 is killed at vLLM AND the litellm gateway (404/400); a model is
never served under a prior model's name. Consumer (comfy-dev/arbo) notified +
migrated; arbo vkeys flipped to all-proxy-models; shared all-agents-local key
repointed to qwen3.6-35b-a3b.

GPU-1 rebalance for the heavier FP8 weights (~34 GB): granite 0.35->0.24 /
131K->64K, embed/rerank 0.05->0.03 (reclaimed util-reservation waste). Verified:
vision correct, 20-concurrent/endpoint load test = no OOM (~7.5 GB headroom).

Drop the llama-swap qwen3.5-9b GPU-0 pin (GPU 0 freed for the creative-writing
hot-swap card). NVFP4 was the lighter fit (~21 GB) but its vLLM ModelOpt-MoE
loader is broken (KeyError w2_input_scale / lm_head.input_scale, vllm #44081);
revisit when fixed.

stacks/llama-swap/conf/config.yaml

@@ -117,24 +117,10 @@ models:
       --presence-penalty 1.5
       --chat-template-kwargs '{"enable_thinking":true}'
 
-  "qwen3.5-9b":
-    name: "Qwen 3.5 9B UD-Q4_K_XL"
-    description: "Dense 9B model. Lightweight general-purpose chat and reasoning."
-    ttl: 0   # pinned — member of the `pinned` group, never unloads
-    cmd: |
-      /app/llama-server
-      --context-shift
-      --model /models/unsloth_Qwen3.5-9B-GGUF/Qwen3.5-9B-UD-Q4_K_XL.gguf
-      --port ${PORT}
-      --n-gpu-layers 999
-      --ctx-size 32768
-      --flash-attn on
-      --temp 1.0
-      --top-p 0.95
-      --top-k 20
-      --min-p 0.00
-      --presence-penalty 1.5
-      --chat-template-kwargs '{"enable_thinking":true}'
+  # "qwen3.5-9b" REMOVED 2026-06-14 — the GPU-0 GGUF pin is dropped. General
+  # chat + vision now served by Qwen3.6-35B-A3B (official FP8) on GPU 1 via vLLM
+  # (stacks/qwen36-vl). GPU 0 is freed for the creative-writing hot-swap card.
+  # The GGUF stays on disk (/models/unsloth_Qwen3.5-9B-GGUF/) if ever wanted.
 
   # --------------------------------------------------------------------------
   # Qwen 3.6 — uses -hf syntax, reads from HF_HOME=/hfcache (host pre-download)
@@ -630,25 +616,10 @@ groups:
       - "qwen3-embedding-0.6B"
       - "qwen3-reranker-0.6B"
 
-  # Pinned general-purpose / utility models. Coexist in VRAM, never
-  # unload. Members also have ttl: 0 individually so idle-timeout can't
-  # drop them.
-  #
-  # Current pins:
-  #   qwen3.5-9b      — ~6 GB at Q4 + KV. General-purpose chat baseline.
-  # VRAM budget: ~6 GB persistent in the pin slot. llama-swap is pinned to
-  # GPU 0 (a single RTX PRO 6000 Blackwell, 96 GB), so this leaves ~90 GB
-  # for whichever non-pinned model the user invokes alongside.
-  #
-  # granite-4-small WAS pinned here; removed 2026-06-04 — superseded by
-  # phi4-mini (vLLM FP8, stacks/vllm → vllm-phi4). Freed ~24 GB (120K KV).
-  #
-  # qwen3.6-35-a3b WAS in this group; removed 2026-04-27 because its
-  # ~29 GB at Q6_K_XL pushed concurrent loads OOM. Now lives outside
-  # with ttl: 0 — never idle-unloads but evictable under memory pressure.
-  "pinned":
-    swap: false
-    exclusive: false
-    persistent: true
-    members:
-      - "qwen3.5-9b"
+  # Pinned group RETIRED 2026-06-14 — its only pin (qwen3.5-9b) was dropped, so
+  # there is no active `pinned` group. General chat/vision moved to Qwen3.6-35B-
+  # A3B FP8 on GPU 1 (vLLM), not a GGUF pin on GPU 0; GPU 0 is now fully free for
+  # the creative-writing hot-swap card. Re-add a `pinned` group here if a
+  # persistent GPU-0 model is ever wanted again.
+  # (History: granite-4-small removed 2026-06-04 → phi4-mini vLLM FP8;
+  #  qwen3.6-35-a3b removed 2026-04-27 — ~29 GB Q6_K_XL OOM'd concurrent loads.)