refactor: remove run_both.py and update launch task to execute streamlit directly

Author: dleija-dev

capabilities/data-visualizer/README.md

@@ -11,10 +11,6 @@ pixi run launch
 
 Streamlit listens on `http://localhost:8501` by default.
 
-To start both the Data Visualizer and the companion `llamacpp` server simultaneously:
-```bash
-python run_both.py
-```
 
 ### Workflow
 

capabilities/data-visualizer/pixi.toml

@@ -34,4 +34,4 @@ environment = "default"
 runs-in = "browser"
 
 [tasks]
-launch = { cmd = "python run_both.py" }
+launch = { cmd = "streamlit run app.py --server.headless true --browser.gatherUsageStats false" }