GH-605: Review 3

[utkarshg6]

[!NOTE] Migrates payables to explicit SentTx/FailedTx with receipt-driven status (TxReceiptsMessage), drops pending-payable DAO/table, introduces detailed scan types/scheduling, and updates APIs, serialization, defaults, and tests.

• Accounting/Scanning:
  • Replace fingerprint-based pending-payable flow with SentTx/FailedTx records and receipt-driven status via TxReceiptsMessage and StatusReadFromReceiptCheck/TxBlock.
  • Remove PendingPayableDao usage; add caches and interpreter for tx receipts; update comparisons/ordering and logging.
  • Introduce DetailedScanType, Retry hints, and ScanReschedulingAfterEarlyStop naming; adjust scheduling APIs.
  • Rename Tx → SentTx and fields to amount_minor/gas_price_minor; propagate across builders, SQL, and assertions.
  • Enhance ValidationStatus with PreviousAttempts (custom serde/ordering) and error-kind restructuring.
• Blockchain Bridge/Interface:
  • Switch receipt processing to map of TxHashByTable → TxReceiptResult; add RegisterNewPendingPayables.
  • Replace legacy receipt/status types; adapt agent submission error to structured form.
• Database:
  • Drop pending_payable table; migrations updated; config defaults now chain-aware for ScanIntervals.
• CLI/Config:
  • Validate payment thresholds and scan-interval relationships; compute scan-interval defaults per chain.
• Tests:
  • Broad updates to reflect new types, messages, scheduling, and logging; new mocks for serializer and caches.

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