fixed requirements

requirements.txt

@@ -16,8 +16,8 @@ sqlmodel==0.0.22
 cachetools
 
 # LlamaIndex ecosystem (pinned to compatible versions)
-llama-index-core==0.11.19
-docling==1.16.1
-llama-index-readers-docling==0.1.0
-llama-index-vector-stores-chroma==0.4.0
-llama-index-node-parser-docling==0.2.0
+llama-index-core
+docling
+llama-index-readers-docling
+llama-index-vector-stores-chroma
+llama-index-node-parser-docling