fix: pin python 3.11 and gradio 5.29.0 in Space metadata

.python-version

@@ -1 +0,0 @@
-3.11

README.md

@@ -4,7 +4,8 @@ emoji: 🧬
 colorFrom: blue
 colorTo: indigo
 sdk: gradio
-sdk_version: 4.44.0
+sdk_version: 5.29.0
+python_version: "3.11"
 app_file: app.py
 pinned: true
 short_description: Clinical evidence synthesis, no API key
@@ -12,5 +13,4 @@ short_description: Clinical evidence synthesis, no API key
 
 # Helix — Clinical Evidence Synthesis
 
-Give any AI model structured, scored access to the world's three largest
-free health databases. No API key needed.
+Clinical evidence synthesis engine — ClinicalTrials.gov, PubMed, and openFDA in one call. No API key needed.

requirements.txt

@@ -1,9 +1,5 @@
-gradio==4.44.0
+gradio==5.29.0
 httpx>=0.27.0
-curl_cffi>=0.7.0
-fastapi>=0.111.0
-uvicorn>=0.30.0
 pydantic>=2.0.0
 python-dotenv>=1.0.0
 rank-bm25>=0.2.2
-mcp[cli]>=1.0.0