feat(program-settings): expose tenant settings APIs and merge PATCH by key

Sold apps can read settings from /get_settings; Super Admin saves only changed keys so huge runtime logs are not sent in the body.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/program-settings/runtime-setting-keys.ts

@@ -0,0 +1,20 @@
+/** کلیدهای runtime / لاگ — مال سوپرادمین نیستند؛ در اپ خانگی توسط cron پر می‌شوند. */
+export const RUNTIME_PROGRAM_SETTING_KEYS = new Set([
+  'montzar_last_product_log',
+  'montzar_order_response',
+  'montzar_live_price',
+  'montzar_mazaneh',
+  'montzar_diff',
+  'montzar_truly_buy_mazaneh',
+  'montzar_truly_sell_mazaneh',
+  'montzar_token',
+  'montzar_closed',
+  'up_price',
+  'down_price',
+  'price_extreme_date',
+  'do_send_liman',
+]);
+
+export function isRuntimeProgramSettingKey(keyRaw: string): boolean {
+  return RUNTIME_PROGRAM_SETTING_KEYS.has(String(keyRaw || '').trim());
+}