- Change file mode from 644 to 755 for all project files
- Add chain_id parameter to get_balance RPC endpoint with default "ait-devnet"
- Rename Miner.extra_meta_data to extra_metadata for consistency
- Add cached decorator to admin stats, job status, payment status, and marketplace stats endpoints
- Configure cache TTLs using get_cache_config for different endpoint types (1min job_list, 30s user_balance, marketplace_stats)
- Import cache_management router and include it in main app with /v1 prefix
- Fix blockchain-explorer formatTimestamp to handle both ISO string and Unix numeric timestamps with type
