Fix TXM stack overflow trigged by new logger

Author: dhaidashenko

chains/txmgr/confirmer.go

@@ -614,7 +614,7 @@ func (ec *Confirmer[CID, HEAD, ADDR, THASH, BHASH, R, SEQ, FEE]) logFieldsPrevio
 	return []interface{}{
 		"etxID", etx.ID,
 		"txHash", attempt.Hash,
-		"previousAttempt", attempt,
+		"previousAttempt", attempt.String(), // use string instead of direct attempt to prevent infinite loop for loggers that use fmt.Sprintf("%v")
 		"feeLimit", attempt.ChainSpecificFeeLimit,
 		"callerProvidedFeeLimit", etx.FeeLimit,
 		"maxGasPrice", ec.feeConfig.MaxFeePrice(),

chains/txmgr/types/tx.go

@@ -189,7 +189,7 @@ type TxAttempt[
 }
 
 func (a *TxAttempt[CHAIN_ID, ADDR, TX_HASH, BLOCK_HASH, SEQ, FEE]) String() string {
-	return fmt.Sprintf("TxAttempt(ID:%d,TxID:%d,Fee:%s,TxType:%d", a.ID, a.TxID, a.TxFee, a.TxType)
+	return fmt.Sprintf("TxAttempt(ID:%d,TxID:%d,Fee:%s,TxType:%d,CreatedAt:%s)", a.ID, a.TxID, a.TxFee, a.TxType, a.CreatedAt.Format(time.RFC3339))
 }
 
 type Tx[