fix: убрать WITHDRAWAL из автонегации, добавить abs() в агрегации, исправить all_time_stats

- Убран WITHDRAWAL из автонегации в create_transaction (ломал profit,
  expenses и display flip в admin_users)
- Добавлен func.abs() в by_type агрегацию (transaction.py)
- Добавлен func.abs() в total_spent user.py (_build_spending_stats_select)
- Исправлен all_time_stats в боте и webapi: передаём явный диапазон дат
  вместо дефолтного текущего месяца

app/database/crud/transaction.py

@@ -39,8 +39,8 @@ async def create_transaction(
     is_completed: bool = True,
     created_at: datetime | None = None,
 ) -> Transaction:
-    # SUBSCRIPTION_PAYMENT and WITHDRAWAL are debits — always store as negative
-    if type in (TransactionType.SUBSCRIPTION_PAYMENT, TransactionType.WITHDRAWAL) and amount_kopeks > 0:
+    # SUBSCRIPTION_PAYMENT — always store as negative (debit from user balance)
+    if type == TransactionType.SUBSCRIPTION_PAYMENT and amount_kopeks > 0:
         amount_kopeks = -amount_kopeks
 
     transaction = Transaction(
@@ -248,7 +248,7 @@ async def get_transactions_statistics(
         select(
             Transaction.type,
             func.count(Transaction.id).label('count'),
-            func.coalesce(func.sum(Transaction.amount_kopeks), 0).label('total_amount'),
+            func.coalesce(func.sum(func.abs(Transaction.amount_kopeks)), 0).label('total_amount'),
         )
         .where(
             and_(

app/database/crud/user.py

@@ -54,7 +54,7 @@ def _build_spending_stats_select():
                 case(
                     (
                         Transaction.type == TransactionType.SUBSCRIPTION_PAYMENT.value,
-                        Transaction.amount_kopeks,
+                        func.abs(Transaction.amount_kopeks),
                     ),
                     else_=0,
                 )

app/handlers/admin/statistics.py

@@ -137,7 +137,9 @@ async def show_revenue_statistics(callback: types.CallbackQuery, db_user: User,
     month_start = now.replace(day=1, hour=0, minute=0, second=0, microsecond=0)
 
     month_stats = await get_transactions_statistics(db, month_start, now)
-    all_time_stats = await get_transactions_statistics(db)
+    all_time_stats = await get_transactions_statistics(
+        db, start_date=datetime(2020, 1, 1, tzinfo=UTC), end_date=now
+    )
     current_time = format_datetime(datetime.now(UTC))
 
     text = f"""

app/webapi/routes/stats.py

@@ -262,7 +262,9 @@ async def stats_full(
     users_stats = await get_users_statistics(db)
     subscriptions_stats = await get_subscriptions_statistics(db)
     trial_stats = await get_trial_statistics(db)
-    transactions_stats = await get_transactions_statistics(db)
+    transactions_stats = await get_transactions_statistics(
+        db, start_date=datetime(2020, 1, 1, tzinfo=UTC), end_date=datetime.now(UTC)
+    )
     referral_stats = await get_referral_statistics(db)
 
     transactions_totals = transactions_stats.get('totals', {})