1.0.7

Document WebSocket UI update fixes

Add documentation describing fixes to WebSocket client that resolve intermittent UI update failures. The doc explains three root causes and their fixes: removing @run_async from process() to avoid emitting Qt signals from ephemeral threads, routing pellet sensor updates through existing filament_runout_state_signal instead of accessing self.printer_model directly, and changing reconnection logic to back off (30s) and reset the counter instead of giving up after 5 failures. Also includes guidance for applying these changes to other projects and an architecture note stressing use of Qt signals for cross-thread communication.