db: Prevent infinite recursion when closing

internal/db/db.go

@@ -66,7 +66,7 @@ func (db *Database) Close() error {
 	if db == nil {
 		panic("no open database")
 	}
-	return db.Close()
+	return db.Bolt.Close()
 }
 
 // Initialize and migrate the database to the current version