fix: check if model files exist before returning cached path

fastembed/common/model_management.py

@@ -413,14 +413,18 @@ def download_model(cls, model: T, cache_dir: str, retries: int = 3, **kwargs: An
             try:
                 cache_kwargs = deepcopy(kwargs)
                 cache_kwargs["local_files_only"] = True
-                return Path(
+                resolved_path = Path(
                     cls.download_files_from_huggingface(
                         hf_source,
                         cache_dir=cache_dir,
                         extra_patterns=extra_patterns,
                         **cache_kwargs,
                     )
                 )
+                if (resolved_path / model.model_file).exists() and all(
+                    (resolved_path / file).exists() for file in extra_patterns
+                ):
+                    return resolved_path
             except Exception:
                 pass
             finally: