Prepare for periodic scan intervals

Add setting to database, and to graphql api

api/database/migrations/001_initial_setup.up.sql

@@ -20,7 +20,7 @@ CREATE TABLE IF NOT EXISTS access_token (
 ) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
 
 CREATE TABLE IF NOT EXISTS site_info (
-  initial_setup boolean NOT NULL DEFAULT TRUE
+  initial_setup boolean NOT NULL DEFAULT TRUE,
 ) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
 
 -- Video related

api/database/migrations/002_site_info_more_settings.up.sql

@@ -0,0 +1,3 @@
+
+ALTER TABLE site_info
+  ADD COLUMN IF NOT EXISTS periodic_scan_interval int(8) NOT NULL DEFAULT 0;