feat: implement billing system with Pally integration

- Added billing models and repository for handling bills.
- Introduced BillingService to manage payment initiation and bill creation.
- Updated user service to remove ticket-related functionality.
- Refactored settings to include new billing-related fields.
- Removed ticket-related handlers and schemas.
- Added new billing handlers for processing payments.
- Updated database schema with new bills table and status enum.
- Enhanced utility functions to calculate prices considering discounts.
- Introduced prehandling for non-private messages.
- Updated main application to initialize new billing services and repositories.

texts.py

@@ -1,5 +1,3 @@
-from db.models.tickets import TicketStatus
-
 # ============================================================
 # PREMIUM EMOJI
 # ============================================================
@@ -42,13 +40,6 @@ _DIVIDER = "──────────────────────
 # МАППИНГИ
 # ============================================================
 
-TICKET_STATUS_EMOJIS = {
-    TicketStatus.CLOSED.value: "🌑",  # Более сдержанно
-    TicketStatus.OPEN.value: "📡",  # В эфире
-    TicketStatus.PENDING.value: "⏳",
-}
-
-
 # ============================================================
 # СТАТУСЫ ПОДПИСКИ
 # ============================================================
@@ -173,6 +164,22 @@ WHITELISTS_ALREADY_ON = "Белые списки уже активны."
 
 CHECKOUT_PAYMENT_CHOICE = "Пока что без автоплатежа. Нажмите кнопку ниже и обратитесь в поддержку для оплаты и активации подписки."
 
+# ============================================================
+# BILLING
+# ============================================================
+
+_BILL_TEMPLATE = (
+    "<b>💸 Счёт на {amount}₽</b>\n\n"
+    "<i>‼️ Вам придёт уведомление в течение нескольких минут после завершения платежа.</i>\n"
+    "<b>🔒 Способ оплаты:</b> <i>{provider}</i>\n\n"
+)
+
+_BILL_LINK = f"<b>{MALENIA_LINK} Ссылка на оплату:</b>"
+
+BILL_CREATION = _BILL_TEMPLATE + _DIVIDER + GENERAL_PROCESSING
+
+BILL_CREATED = _BILL_TEMPLATE + _DIVIDER + _BILL_LINK
+
 
 # ============================================================
 # ПОДДЕРЖКА