walletdb: fix convert_version_58 for partial local txs

The transaction dict can also contain PSBTs (in addition to complete raw hex txs).
This is the case if the user has saved a partial (e.g. unsigned) tx as local into the history.

fixes https://github.com/spesmilo/electrum/issues/8913

electrum/wallet_db.py

@@ -40,7 +40,7 @@ from . import util, bitcoin
 from .util import profiler, WalletFileException, multisig_type, TxMinedInfo, bfh, MyEncoder
 from .invoices import Invoice, Request
 from .keystore import bip44_derivation
-from .transaction import Transaction, TxOutpoint, tx_from_any, PartialTransaction, PartialTxOutput
+from .transaction import Transaction, TxOutpoint, tx_from_any, PartialTransaction, PartialTxOutput, BadHeaderMagic
 from .logging import Logger
 
 from .lnutil import LOCAL, REMOTE, HTLCOwner, ChannelType
@@ -1119,7 +1119,10 @@ class WalletDBUpgrader(Logger):
         transactions = self.get('transactions', {})  # txid -> raw_tx
         prevouts_by_scripthash = {}
         for txid, raw_tx in transactions.items():
-            tx = Transaction(raw_tx)
+            try:
+                tx = PartialTransaction.from_raw_psbt(raw_tx)
+            except BadHeaderMagic:
+                tx = Transaction(raw_tx)
             for idx, txout in enumerate(tx.outputs()):
                 outpoint = f"{txid}:{idx}"
                 scripthash = script_to_scripthash(txout.scriptpubkey.hex())