Update requirements.txt

requirements.txt

@@ -1,6 +1,15 @@
-fastapi==0.111.0
-uvicorn[standard]==0.29.0
-pydantic==2.7.1
-pyyaml==6.0.1
-openai==1.30.1
-httpx==0.27.0
+# Core API/Server
+fastapi>=0.104.0
+uvicorn>=0.24.0
+pydantic>=2.0.0
+
+# LLM Client
+openai>=1.0.0
+
+# Data science
+numpy>=1.20.0
+pandas>=1.3.0
+
+# Development (optional, can be removed for production)
+pytest>=7.0.0
+pytest-asyncio>=0.23.0