- Add /export-chain endpoint to export full blockchain state (blocks, accounts, transactions) as JSON
- Add /import-chain endpoint to import chain state with backup and data clearing
- Add /force-sync endpoint to trigger reorg by fetching and importing peer's chain state
- Fix duplicate import_block implementation (remove redundant async with _import_lock block)
- Fix wallet adapter to use chain_id=ait-testnet instead of ait
79516a4388