Add AWL discount.

Author: HalfVoxel

api/src/basic_types/enums.py

@@ -4,6 +4,7 @@
 class PriceLevel(Enum):
     Normal = "normal"
     LowIncomeDiscount = "low_income_discount"
+    AWLDiscount = "awl_discount"
 
 
 class AccountingEntryType(Enum):

api/src/migrations/0034_awl_discount.sql

@@ -0,0 +1 @@
+ALTER TABLE `membership_members` MODIFY COLUMN `price_level` ENUM('normal', 'low_income_discount', 'awl_discount') NOT NULL DEFAULT 'normal';