GH-598: second QA fix - first review

[bertllll]

Note

Renames pending-failure terms, schedules retry-payables via delayed notifier with configurable interval, corrects retry template amounts to latest payable balance, adds richer debug/warn logging, and updates tests and RPC endpoints.

• Scanning/Terminology:
  • Rename yet_unproven_failed_payables → suspected_failed_payables; normal_confirmations → standard_confirmations; update log lines (e.g., "... 0 suspected failures ...").
• Retry Payables Scheduling:
  • Switch from immediate notify to notify_later with retry_payable_scan_interval (default: half of payable interval); propagate through mocks/tests; reset_scan_timer(&logger).
• Retry Tx Templates:
  • RetryTxTemplate::new(...) now logs and sets amount_in_wei to the latest payable balance (not additive); constructors updated to accept logger.
• Pending Payables Scanner:
  • Extra debug logs (harvesting, retry requirement, confirmations/failures processing); renamed helpers accordingly.
• Payable Scanner:
  • Log failed txs recorded during new-scan handling.
• Error/Recovery:
  • On ScanError without UI context, attempt to restore scan sequence and log it.
• Blockchain Interface (Web3):
  • get_transaction_id uses latest (no explicit Pending block); log latest nonce before sending; warn on batch submit failure; tests assert warning.
• Tests/Integrations:
  • Update multinode and unit tests for new terms, delayed retry scheduling, intervals, and logger params.
  • Add https://eth.llamarpc.com as an additional Ethereum mainnet RPC endpoint in integration tests.

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[utkarshg6]

Perhaps you could add more details to this log, using the contents of the error.