fix: restore get_ollama_models() function body

The function was accidentally truncated when adding get_jean_context_lengths().
This caused TypeError: 'NoneType' object is not iterable in list_models().

jean-router/app.py

@@ -74,6 +74,19 @@ def get_ollama_models(force_refresh=False):
     if not force_refresh and ollama_cache["data"] and (now - ollama_cache["timestamp"]) < CACHE_TTL:
         return ollama_cache["data"]
 
+    try:
+        url = f"http://{OLLAMA_PROXY_HOST}:{OLLAMA_PROXY_PORT}/api/tags"
+        r = requests.get(url, timeout=3)
+        if r.ok:
+            data = r.json().get("models", [])
+            ollama_cache["data"] = data
+            ollama_cache["timestamp"] = now
+            return data
+    except Exception as e:
+        log.warning(f"[Ollama] Erreur récupération: {e}")
+
+    return ollama_cache["data"]
+
 
 def get_jean_context_lengths():
     """Récupère les context_length depuis Jean /v1/models (avec cache)"""