Stop framework runs hanging silently at start

A station run of a framework procedure could sit on the spinner forever with no error when the test worker process was blocked from starting — most often by security software on locked-down machines.

• Fixed framework runs hanging indefinitely at startup: the station now stops waiting after a deadline and shows a clear, actionable error naming the likely cause.
• Added the worker's own error output to the failure message, so a crash during startup points straight at the offending line.