feat: add subscription and transaction repositories

- Implemented SubscriptionRepository with methods to get, create, and update subscriptions.
- Added BalanceTXRepository for creating and retrieving balance transactions.
- Introduced a test script for simulating Pally webhook for local testing.

misc/utils.py

@@ -231,5 +231,5 @@ def get_subscription_link(short_uuid: str):
     return settings.subscription_url + "/" + short_uuid
 
 
-def build_main_menu_text(link: str) -> str:
-    return texts.MAIN_MENU.format(quote=fetch_quote(), link=link)
+def build_main_menu_text(link: str, balance: int) -> str:
+    return texts.MAIN_MENU.format(quote=fetch_quote(), link=link, balance=balance)