fix: use direct dependencies in root requirements.txt for HF Spaces

requirements.txt

@@ -1,7 +1,22 @@
-# Hugging Face Spaces installs dependencies from the repository root.
-# Reuse the project's existing dependency list.
-
--r CodeWeaver/requirements.txt
-
-
+# Hugging Face Spaces dependencies
+# Direct dependency list (relative path references don't work in HF Spaces)
 
+qdrant-client
+pytest
+pytest-asyncio
+python-dotenv
+tavily-python
+requests
+langsmith>=0.1.0
+langchain-core>=0.3.0
+langchain-google-genai>=2.0.0
+langgraph>=0.2.0
+fastembed>=0.7.0
+gradio==4.44.1
+pydantic>=2.0.0
+pydantic-settings>=2.0.0
+langgraph-checkpoint-postgres
+psycopg-binary
+psycopg-pool
+pyyaml
+jinja2