feat(fabric): decommission Swapper from critical path, NCS = source of truth

- Node Worker: replace swapper_vision with ollama_vision (direct Ollama API)
- Node Worker: add NATS subjects for stt/tts/image (stubs ready)
- Node Worker: remove SWAPPER_URL dependency from config
- Router: vision calls go directly to Ollama /api/generate with images
- Router: local LLM calls go directly to Ollama /api/generate
- Router: add OLLAMA_URL and PREFER_NODE_WORKER=true feature flag
- Router: /v1/models now uses NCS global capabilities pool
- NCS: SWAPPER_URL="" -> skip Swapper probing (status=disabled)
- Swapper configs: remove all hardcoded model lists, keep only runtime
  URLs, timeouts, limits
- docker-compose.node1.yml: add OLLAMA_URL, PREFER_NODE_WORKER for router;
  SWAPPER_URL= for NCS; remove swapper-service from node-worker depends_on
- docker-compose.node2-sofiia.yml: same changes for NODA2

Swapper service still runs but is NOT in the critical inference path.
Source of truth for models is now NCS -> Ollama /api/tags.

Made-with: Cursor

services/node-capabilities/main.py

@@ -20,7 +20,7 @@ app = FastAPI(title="Node Capabilities Service", version="1.0.0")
 
 NODE_ID = os.getenv("NODE_ID", "noda2")
 OLLAMA_BASE_URL = os.getenv("OLLAMA_BASE_URL", "http://host.docker.internal:11434")
-SWAPPER_URL = os.getenv("SWAPPER_URL", "http://swapper-service:8890")
+SWAPPER_URL = os.getenv("SWAPPER_URL", "")  # empty = skip Swapper probing
 LLAMA_SERVER_URL = os.getenv("LLAMA_SERVER_URL", "")
 
 _cache: Dict[str, Any] = {}
@@ -74,7 +74,10 @@ async def _collect_ollama() -> Dict[str, Any]:
 
 
 async def _collect_swapper() -> Dict[str, Any]:
-    runtime: Dict[str, Any] = {"base_url": SWAPPER_URL, "status": "unknown", "models": [], "vision_models": [], "active_model": None}
+    runtime: Dict[str, Any] = {"base_url": SWAPPER_URL or "n/a", "status": "unknown", "models": [], "vision_models": [], "active_model": None}
+    if not SWAPPER_URL:
+        runtime["status"] = "disabled"
+        return runtime
     try:
         async with httpx.AsyncClient(timeout=5) as c:
             h = await c.get(f"{SWAPPER_URL}/health")