Deploy OpenHTF procedures from GitHub

OpenHTF is a first-class framework alongside the TofuPilot Framework for stations: clone a starter from /new, push to GitHub, the station picks up your test on the next deploy.

• Added a one-click OpenHTF Starter template in /new -- single procedure showing plugs, prompts, hard + marginal limits, regex validators, voltage-vs-time chart, attachments, and skip flow control
• Streamed live phase events (phase started/ended, measurements, prompts, attachments) so the operator UI mirrors what is happening on the station in real time
• Routed native user_input prompts to the web operator UI, with timeouts and operator-typed responses flowing back to OpenHTF without leaving the dashboard
• Rendered marginal limits, multi-dim charts, and validator expressions natively in the dashboard from the connector's structured payloads