graph/db+sqldb: batch validation for zombie index migration

Finally, we update the migrateZombieIndex function to use batch
validation just like was done in the previous commits. Here, we
additionally make sure to validate the entire zombie index entry and not
just the SCID.

sqldb/sqlc/graph.sql.go

@@ -2261,6 +2261,57 @@ func (q *Queries) GetZombieChannel(ctx context.Context, arg GetZombieChannelPara
 	return i, err
 }
 
+const getZombieChannelsSCIDs = `-- name: GetZombieChannelsSCIDs :many
+SELECT scid, version, node_key_1, node_key_2
+FROM graph_zombie_channels
+WHERE version = $1
+  AND scid IN (/*SLICE:scids*/?)
+`
+
+type GetZombieChannelsSCIDsParams struct {
+	Version int16
+	Scids   [][]byte
+}
+
+func (q *Queries) GetZombieChannelsSCIDs(ctx context.Context, arg GetZombieChannelsSCIDsParams) ([]GraphZombieChannel, error) {
+	query := getZombieChannelsSCIDs
+	var queryParams []interface{}
+	queryParams = append(queryParams, arg.Version)
+	if len(arg.Scids) > 0 {
+		for _, v := range arg.Scids {
+			queryParams = append(queryParams, v)
+		}
+		query = strings.Replace(query, "/*SLICE:scids*/?", makeQueryParams(len(queryParams), len(arg.Scids)), 1)
+	} else {
+		query = strings.Replace(query, "/*SLICE:scids*/?", "NULL", 1)
+	}
+	rows, err := q.db.QueryContext(ctx, query, queryParams...)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var items []GraphZombieChannel
+	for rows.Next() {
+		var i GraphZombieChannel
+		if err := rows.Scan(
+			&i.Scid,
+			&i.Version,
+			&i.NodeKey1,
+			&i.NodeKey2,
+		); err != nil {
+			return nil, err
+		}
+		items = append(items, i)
+	}
+	if err := rows.Close(); err != nil {
+		return nil, err
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	return items, nil
+}
+
 const highestSCID = `-- name: HighestSCID :one
 SELECT scid
 FROM graph_channels