fix(models): query v1 models for llama-server endpoints (#3380)

* fix(models): query v1 models for llama-server endpoints

* test(models): accept owner kwargs in llama-server regression

src/endpoint_resolver.py

@@ -184,7 +184,7 @@ def build_chat_url(base: str) -> str:
 
 def build_models_url(base: str) -> Optional[str]:
     """Return the provider-specific model-list endpoint URL for a base."""
-    base = resolve_url(base)
+    base = normalize_base(resolve_url(base))
     provider = _detect_provider(base)
     if provider == "anthropic":
         return _anthropic_api_root(base) + "/v1/models"