refactor: split backend domains and add API behavior coverage

bot/services/subscription_service_impl/_runtime.py

@@ -0,0 +1,29 @@
+# ruff: noqa: F401,F403,F405,I001
+import logging
+import math
+from datetime import datetime, timedelta, timezone
+from typing import Any, Dict, List, Optional, Tuple
+
+from aiogram import Bot
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from bot.middlewares.i18n import JsonI18n
+from bot.utils.config_link import prepare_config_links
+from bot.utils.date_utils import add_months, month_start
+from config.settings import Settings
+from config.tariffs_config import Tariff
+from db.dal import (
+    payment_dal,
+    promo_code_dal,
+    subscription_dal,
+    tariff_dal,
+    user_billing_dal,
+    user_dal,
+)
+from db.models import Subscription, User
+
+from bot.services.email_auth_service import EmailAuthService
+from bot.services.email_templates import render_payment_success
+from bot.services.panel_api_service import PanelApiService
+
+__all__ = [name for name in globals() if not name.startswith("__")]