deploy: auto-sync reactor.py to /opt/jarvis-arc on deploy

When deploy/reactor.py changes in a push, the deploy runner now copies it
to the runtime location and restarts jarvis-arc.service automatically.
Eliminates the two-copy drift problem — repo is now canonical.

deploy/jarvis-deploy.sh

@@ -79,6 +79,13 @@ while IFS= read -r path; do
     if [[ "$path" == *"jarvis"* ]]; then
         systemctl reload lsws 2>/dev/null || systemctl restart lsws 2>/dev/null
         log "OLS reloaded for JARVIS deploy"
+
+        # Sync reactor.py to runtime location if it changed
+        if echo "$CHANGED" | grep -q 'deploy/reactor.py'; then
+            cp "$path/deploy/reactor.py" /opt/jarvis-arc/reactor.py
+            systemctl restart jarvis-arc
+            log "Arc Reactor updated and restarted (reactor.py changed)"
+        fi
     fi
 
 done <<< "$SNAPSHOT"