add: more debug logs

src/models/controller.c

@@ -13,6 +13,7 @@
 static int
 db_update_insert(controller_t *controller, sqlite3_stmt *stmt)
 {
+    LOGGER_DEBUG("saving controller '%s' into database (id: %d)\n", controller->name, controller->id);
     int rc;
 
     sqlite3_bind_int(stmt, 1, controller->id);