fix: correct astro-orbiter llama-server scrape target for router cutover

Port 8000 (gemma-2-27b-it-GGUF) is dead after the day2 router cutover on
2026-08-12. Production inference now runs through llama-server-router on
port 8002.

The router exposes per-model Prometheus metrics via /metrics?model=<id>.
Since a single /metrics request without ?model returns HTTP 400, replaced
the single stale job with three per-model jobs — one per model registered
in the router per /v1/models:
  - Qwen3.6-35B-A3B-UD-Q4_K_S  (currently unloaded but registered)
  - Meta-Llama-3.1-8B-Instruct-Q4_K_M  (loaded)
  - Phi-3.5-mini-instruct-Q8_0  (loaded)

Static 'model' label carries the canonical llama.cpp model id (not alias).
Added 'endpoint: astro-orbiter-router' to identify the scrape origin.
Removed dead :8000 target entirely.

cluster/applications/monitoring/values.yaml

@@ -232,15 +232,50 @@ prometheus:
               hostname: astro-orbiter
               gpu: rtx3090
 
-      - job_name: llama-server-astro-orbiter
+      # Router exposes per-model Prometheus metrics via /metrics?model=<id>.
+      # The old :8000 target (gemma-2-27b-it-GGUF) was removed after the day2
+      # cutover (2026-08-12) to llama-server-router on :8002. Three separate
+      # jobs — one per model registered in the router — are used so each gets
+      # its own model label. The static `model` label is set to the canonical
+      # llama.cpp model id (the `id` field from /v1/models, not the alias).
+      - job_name: llama-server-astro-orbiter-qwen3
         scrape_interval: 15s
         metrics_path: /metrics
+        params:
+          model: ["Qwen3.6-35B-A3B-UD-Q4_K_S"]
         static_configs:
           - targets:
-              - 10.1.71.130:8000
+              - 10.1.71.130:8002
             labels:
               hostname: astro-orbiter
-              model: bartowski/gemma-2-27b-it-GGUF
+              endpoint: astro-orbiter-router
+              model: Qwen3.6-35B-A3B-UD-Q4_K_S
+
+      - job_name: llama-server-astro-orbiter-llama3
+        scrape_interval: 15s
+        metrics_path: /metrics
+        params:
+          model: ["Meta-Llama-3.1-8B-Instruct-Q4_K_M"]
+        static_configs:
+          - targets:
+              - 10.1.71.130:8002
+            labels:
+              hostname: astro-orbiter
+              endpoint: astro-orbiter-router
+              model: Meta-Llama-3.1-8B-Instruct-Q4_K_M
+
+      - job_name: llama-server-astro-orbiter-phi35
+        scrape_interval: 15s
+        metrics_path: /metrics
+        params:
+          model: ["Phi-3.5-mini-instruct-Q8_0"]
+        static_configs:
+          - targets:
+              - 10.1.71.130:8002
+            labels:
+              hostname: astro-orbiter
+              endpoint: astro-orbiter-router
+              model: Phi-3.5-mini-instruct-Q8_0
 
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