first commit

server/prisma/migrations/20260103141836_add_batch_id_to_usage/migration.sql

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+/*
+  Warnings:
+
+  - A unique constraint covering the columns `[user_id,batch_id]` on the table `redeem_code_usages` will be added. If there are existing duplicate values, this will fail.
+
+*/
+-- AlterTable
+ALTER TABLE "redeem_code_usages" ADD COLUMN     "batch_id" TEXT;
+
+-- CreateIndex
+CREATE UNIQUE INDEX "redeem_code_usages_user_id_batch_id_key" ON "redeem_code_usages"("user_id", "batch_id");