reorg: split repo / database so settings can use db connection as well

kordophone-db/migrations/2025-04-25-223015_add_settings/down.sql

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+-- This file should undo anything in `up.sql`
+
+
+
+
+
+DROP TABLE IF EXISTS `settings`;

kordophone-db/migrations/2025-04-25-223015_add_settings/up.sql

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+-- Your SQL goes here
+
+
+
+
+
+CREATE TABLE `settings`(
+	`key` TEXT NOT NULL PRIMARY KEY,
+	`value` BINARY NOT NULL
+);
+