fix(monitoring): drop Qwen3.6 scrape job — causes CUDA OOM on each scrape (t_02c15dae)

/metrics?model=Qwen3.6 forces the router to attempt loading Qwen3.6 every
90s scrape cycle, triggering a CUDA OOM error since VRAM is already consumed
by the resident Llama3+Phi3.5 models. This produces real GPU power spikes
(~110W load-attempt), not a benign counter read like the Llama3/Phi3.5 jobs.

nvidia_gpu_exporter (:9835) already provides GPU power/VRAM/utilization at
zero wake cost. No Grafana dashboard panel references Qwen3.6 model-specific
llama-server metrics. Ryan approved full removal.

Job is commented out (not deleted) for easy revert if Qwen3.6 is ever
re-added as a resident model. Llama3/Phi3.5 scrape jobs untouched.

cluster/applications/monitoring/values.yaml

@@ -242,18 +242,29 @@ prometheus:
       # wakes the GPU sub-server to P2 (~110W); at 15s, continuous spikes kept
       # the GPU drawing ~110W despite zero inference load. At 90s, the GPU gets
       # ~80s of genuine P8 idle (~20W) between wake-ups. (t_e7d547ea, 2026-08-13)
-      - job_name: llama-server-astro-orbiter-qwen3
-        scrape_interval: 90s
-        metrics_path: /metrics
-        params:
-          model: ["Qwen3.6-35B-A3B-UD-Q4_K_S"]
-        static_configs:
-          - targets:
-              - 10.1.71.130:8002
-            labels:
-              hostname: astro-orbiter
-              endpoint: astro-orbiter-router
-              model: Qwen3.6-35B-A3B-UD-Q4_K_S
+
+      # llama-server-astro-orbiter-qwen3 REMOVED (t_02c15dae, 2026-08-13):
+      # /metrics?model=Qwen3.6 forces the router to attempt loading Qwen3.6 each
+      # scrape cycle, which fails with CUDA OOM (VRAM already consumed by resident
+      # Llama3+Phi3.5). This generated real GPU power spikes, not just a benign
+      # counter read. nvidia_gpu_exporter (:9835) already covers GPU power/VRAM/
+      # utilization at zero wake cost. No Grafana dashboard panel depends on
+      # Qwen3.6-specific llama-server metrics. Ryan approved full removal.
+      # Commented out rather than deleted for easy revert if Qwen3.6 is ever
+      # re-added as a resident model.
+      #
+      # - job_name: llama-server-astro-orbiter-qwen3
+      #   scrape_interval: 90s
+      #   metrics_path: /metrics
+      #   params:
+      #     model: ["Qwen3.6-35B-A3B-UD-Q4_K_S"]
+      #   static_configs:
+      #     - targets:
+      #         - 10.1.71.130:8002
+      #       labels:
+      #         hostname: astro-orbiter
+      #         endpoint: astro-orbiter-router
+      #         model: Qwen3.6-35B-A3B-UD-Q4_K_S
 
       - job_name: llama-server-astro-orbiter-llama3
         scrape_interval: 90s