P1: NCS-first model selection + NATS capabilities + Grok 4.1

Router model selection:
- New model_select.py: resolve_effective_profile → profile_requirements →
  select_best_model pipeline. NCS-first with graceful static fallback.
- selection_policies in router-config.node2.yml define prefer order per
  profile without hardcoding models (e.g. local_default_coder prefers
  qwen3:14b then qwen3.5:35b-a3b).
- Cloud profiles (cloud_grok, cloud_deepseek) skip NCS; on cloud failure
  use fallback_profile via NCS for local selection.
- Structured logs: selected_profile, required_type, runtime, model,
  caps_age_s, fallback_reason on every infer request.

Grok model fix:
- grok-2-1212 no longer exists on xAI API → updated to
  grok-4-1-fast-reasoning across all 3 hardcoded locations in main.py
  and router-config.node2.yml.

NCS NATS request/reply:
- node-capabilities subscribes to node.noda2.capabilities.get (NATS
  request/reply). Enabled via ENABLE_NATS_CAPS=true in compose.
- NODA1 router can query NODA2 capabilities over NATS leafnode without
  HTTP connectivity.

Verified:
- NCS: 14 served models from Ollama+Swapper+llama-server
- NATS: request/reply returns full capabilities JSON
- Sofiia: cloud_grok → grok-4-1-fast-reasoning (tested, 200 OK)
- Helion: NCS → qwen3:14b via Ollama (caps_age=23.7s cache hit)
- Router health: ok

Made-with: Cursor

services/router/router-config.node2.yml

@@ -128,11 +128,11 @@ llm_profiles:
     provider: grok
     base_url: https://api.x.ai
     api_key_env: GROK_API_KEY
-    model: grok-2-1212
+    model: grok-4-1-fast-reasoning
     max_tokens: 2048
     temperature: 0.2
     timeout_ms: 60000
-    description: "Grok API для SOFIIA (Chief AI Architect)"
+    description: "Grok 4.1 Fast Reasoning для SOFIIA (Chief AI Architect)"
 
 # ============================================================================
 # Node Capabilities
@@ -141,6 +141,72 @@ node_capabilities:
   url: http://node-capabilities:8099/capabilities
   cache_ttl_sec: 30
 
+# ============================================================================
+# Selection Policies (NCS-first model selection)
+# ============================================================================
+# Router uses these to map profile → required_type + prefer order.
+# NCS picks the best served model matching these requirements.
+# Cloud profiles skip NCS; if cloud fails, fallback_profile is used via NCS.
+selection_policies:
+  local_default_coder:
+    required_type: llm
+    prefer: ["qwen3:14b", "qwen3.5:35b-a3b", "*"]
+
+  local_default_reasoner:
+    required_type: llm
+    prefer: ["qwen3.5:35b-a3b", "deepseek-r1:70b", "*"]
+
+  qwen3_strategist_8b:
+    required_type: llm
+    prefer: ["qwen3:14b", "qwen3.5:35b-a3b", "*"]
+
+  qwen3_support_8b:
+    required_type: llm
+    prefer: ["qwen3:14b", "gemma3:latest", "*"]
+
+  qwen3_science_8b:
+    required_type: llm
+    prefer: ["qwen3:14b", "qwen3.5:35b-a3b", "*"]
+
+  qwen3_creative_8b:
+    required_type: llm
+    prefer: ["qwen3:14b", "*"]
+
+  qwen3_5_35b_a3b:
+    required_type: llm
+    prefer: ["qwen3.5:35b-a3b", "*"]
+
+  qwen3_vision_8b:
+    required_type: vision
+    prefer: ["llava:13b", "*"]
+
+  qwen2_5_3b_service:
+    required_type: llm
+    prefer: ["phi3:latest", "gemma3:latest", "qwen3:14b"]
+
+  mistral_community_12b:
+    required_type: llm
+    prefer: ["mistral-nemo:12b", "qwen3:14b", "*"]
+
+  cloud_deepseek:
+    required_type: cloud_llm
+    provider: deepseek
+    fallback_profile: local_default_coder
+
+  cloud_grok:
+    required_type: cloud_llm
+    provider: grok
+    fallback_profile: local_default_coder
+
+  cloud_mistral:
+    required_type: cloud_llm
+    provider: mistral
+    fallback_profile: local_default_coder
+
+  vision_default:
+    required_type: vision
+    prefer: ["llava:13b", "*"]
+
 # ============================================================================
 # Orchestrator Providers
 # ============================================================================