chore: remove node-red-mqtt-publisher.json from git tracking

File now ignored locally via .git/info/exclude

Co-Authored-By: Claude (glm-4.7) <noreply@anthropic.com>

Author: smilexth

.gitignore

@@ -10,7 +10,6 @@
 # Configuration files (may contain sensitive data)
 config.toml
 node-red.json
-node-red-mqtt-publisher.json
 
 # Build artifacts
 /release