Add dependencies for vector database and embeddings in requirements.txt

Include 'chromadb' and 'sentence-transformers' to support vector database functionality and embeddings processing. Ensure 'python-dateutil' is retained for date handling.

Author: edofransisco011

requirements.txt

@@ -14,4 +14,8 @@ google-auth-httplib2
 google-auth-oauthlib
 
 # Qwen-Agent Dependencies
-python-dateutil
+python-dateutil
+
+# Vector Database & Embeddings
+chromadb
+sentence-transformers