Add optional sync backend for multi-device synchronization#54

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bl4ckh4nd wants to merge 2 commits intoBEKO2210:mainfrom

bl4ckh4nd:add-sync-backend

Commits on Mar 12, 2026

feat(sync-backend): initialize backend with Fastify, SQLite, and CORS support
bl4ckh4nd
committed
Fix field-clear propagation in product sync and allow re-pairing
bl4ckh4nd
committed