Added a way to resolve callback manager in embed model

app.py

@@ -2,6 +2,7 @@
 from llama_index.core import VectorStoreIndex, StorageContext, load_index_from_storage
 from langchain_nvidia_ai_endpoints import ChatNVIDIA, NVIDIAEmbeddings, NVIDIARerank
 from llama_index.core.indices.query.query_transform import HyDEQueryTransform
+from llama_index.core.embeddings.utils import resolve_embed_model
 from llama_index.core.query_engine import TransformQueryEngine
 from langchain_core.documents import Document as LangDocument
 from llama_index.core import Document as LlamaDocument
@@ -29,13 +30,18 @@ embed_model = NVIDIAEmbeddings(
     truncate="NONE"
 )
 
+def custom_resolve_embed_model(embed_model):
+    if isinstance(embed_model, NVIDIAEmbeddings):
+        return embed_model
+    return resolve_embed_model(embed_model)
+
 reranker = NVIDIARerank(
   model="nvidia/nv-rerankqa-mistral-4b-v3", 
   api_key=nvidia_api_key,
 )
 
 # Set the NVIDIA models globally
-Settings.embed_model = embed_model
+Settings.embed_model = custom_resolve_embed_model(embed_model)
 Settings.llm = client
 
 # Parse the local PDF document