Add VERSION file to Docker workflow triggers

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.github/workflows/docker-publish.yml

@@ -6,6 +6,7 @@ on:
     paths:
       - 'Dockerfile'
       - 'requirements.txt'
+      - 'VERSION'
   # Allow manual trigger for when you need to rebuild anyway
   workflow_dispatch: