payments/migration1: freeze lnwire and record dependency

Also freeze the lnwire and record packages used by the migration.

Copy the minimal subset of lnwire files (16) into
payments/db/migration1/lnwire/ and all record files (6) into
payments/db/migration1/record/. Three lnwire files are trimmed to avoid
pulling in the full message-type dispatch tree — all changes are purely
subtractive and can be verified with:

  diff lnwire/message.go payments/db/migration1/lnwire/message.go
  diff lnwire/writer.go  payments/db/migration1/lnwire/writer.go
  diff lnwire/lnwire.go  payments/db/migration1/lnwire/lnwire.go

All migration1 files now import only the frozen packages, removing the
live dependency on lnwire and record so future changes to those packages
cannot affect migration correctness.

payments/db/migration1/sql_migration_test.go

@@ -15,9 +15,9 @@ import (
 	"github.com/btcsuite/btcd/btcec/v2"
 	"github.com/lightningnetwork/lnd/kvdb"
 	"github.com/lightningnetwork/lnd/lntypes"
-	"github.com/lightningnetwork/lnd/lnwire"
+	"github.com/lightningnetwork/lnd/payments/db/migration1/lnwire"
+	"github.com/lightningnetwork/lnd/payments/db/migration1/record"
 	"github.com/lightningnetwork/lnd/payments/db/migration1/sqlc"
-	"github.com/lightningnetwork/lnd/record"
 	"github.com/lightningnetwork/lnd/sqldb"
 	"github.com/stretchr/testify/require"
 )