Got key values working

src-tauri/migrations/20230316052652_key-values.sql

@@ -0,0 +1,12 @@
+CREATE TABLE key_values
+(
+    model      TEXT     NOT NULL DEFAULT 'key_value',
+    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    deleted_at DATETIME,
+    namespace  TEXT     NOT NULL,
+    key        TEXT     NOT NULL,
+    value      TEXT     NOT NULL,
+
+    PRIMARY KEY (namespace, key)
+);