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.

docker-compose.yml

@@ -3,6 +3,7 @@ services:
     image: postgres:16-alpine
     container_name: maleniabot_db
     environment:
+      TZ: UTC
       POSTGRES_USER: ${POSTGRES_USER:-malenia}
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-malenia_password}
       POSTGRES_DB: ${POSTGRES_DB:-malenia_db}
@@ -28,6 +29,7 @@ services:
       postgres:
         condition: service_healthy
     environment:
+      TZ: UTC
       BOT_TOKEN: ${BOT_TOKEN}
       POSTGRES_URL: postgresql+asyncpg://${POSTGRES_USER:-malenia}:${POSTGRES_PASSWORD:-malenia_password}@postgres:5432/${POSTGRES_DB:-malenia_db}
       PROXY: ${PROXY:-}
@@ -51,6 +53,7 @@ services:
       postgres:
         condition: service_healthy
     environment:
+      TZ: UTC
       BOT_TOKEN: ${BOT_TOKEN}
       POSTGRES_URL: postgresql+asyncpg://${POSTGRES_USER:-malenia}:${POSTGRES_PASSWORD:-malenia_password}@postgres:5432/${POSTGRES_DB:-malenia_db}
       PROXY: ${PROXY:-}