Avoid marking a Solana signature as processed when order matching or
OrderProcessing fails with a retryable error. Keep terminal outcomes
idempotent while allowing later scans to retry transient failures.
- Rewrite Solana scanner: stateless scan with processed-signature cache, query wallet + USDT ATA + USDC ATA addresses to cover all SPL transfers
- Add network field to transaction_lock (4-tuple unique index) and order flow
- Add wallet management endpoints (add/list/get/status/delete) with token auth
- Add network info to Telegram payment notification
- Add USDC hint to test script GMPay prompt
- Add API docs and Solana scanning docs