Fix Qdrant Client Compatibility and Role RAG Tests

- Upgrade qdrant-client usage to query_points (replacing deprecated search)
- Relax qdrant-client version constraint in requirements.txt (>=1.7.0)
- Config: Allow extra environment variables in Settings (for local dev)
- test_roles_rag.py: Fix import path for local execution

test_roles_rag.py

@@ -6,7 +6,8 @@ import json
 from pathlib import Path
 
 # Add app to path
-sys.path.insert(0, '/app')
+# Add app to path (local execution)
+sys.path.insert(0, os.path.join(os.getcwd(), 'app'))
 
 from services.provider_factory import ProviderFactory
 from utils.rag_chat import RAGChatService