Constellation Sync 0.5.2

• graph.json is hard-excluded from config sync: the graph view rewrites it on every interaction, turning each cycle into a mid-sync change while carrying little value. The exclusion applies on every device once updated — no manual unchecking needed — and stale selections migrate out automatically. Existing graph.json files are frozen, not deleted.
• Stale artifacts (conflict copies from first adoption, frozen plugin data files) were removed from the sync branch.