- Fix sync_state.json parsing: derive last_updated from table last_sync
timestamps when root-level field is missing (flat format support)
- Parse ALL YAML blocks from data_description.md (was only first block)
- Show remote tables (daily_deal_traffic) in catalog with "Live" badge
- Show per-table sync timestamps and Local/Live query mode badges
- Add data freshness note to Business Metrics section
- Dashboard: fix "Not yet synced" bug, show local/live table breakdown
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