Play process restart required

The change requires L4: restarting the play process from a snapshot. The compile server detects changed engine bindings loaded in the host's non-unloadable default context. The last good code keeps running until restart; L1, L2 or an L3 module swap cannot replace that assembly.

#Common causes

• A watched engine reference such as Ara.Runtime changed on disk while the process was running.

#Fixes

• Restart the play process from a snapshot using matching engine and script artifacts.

• Keep routine gameplay edits in reloadable modules rather than changing the runtime assembly.

• Code: ARA0926

• Constant: script::RESTART_REQUIRED

• Reported by: ara-script, Ara.Host