chore: stabilize lint and verify builds

backend/database/migrations/20260204154427_create_recharge_codes.sql

@@ -0,0 +1,29 @@
+-- +goose Up
+-- +goose StatementBegin
+CREATE TABLE IF NOT EXISTS recharge_codes(
+    id bigserial PRIMARY KEY,
+    code varchar(64) NOT NULL,
+    amount bigint NOT NULL,
+    status varchar(32) DEFAULT 'inactive',
+    activated_by bigint DEFAULT 0,
+    activated_at timestamp with time zone,
+    redeemed_by bigint DEFAULT 0,
+    redeemed_at timestamp with time zone,
+    redeemed_order_id bigint DEFAULT 0,
+    remark varchar(255) DEFAULT '',
+    created_at timestamp with time zone DEFAULT NOW(),
+    updated_at timestamp with time zone DEFAULT NOW(),
+    UNIQUE (code)
+);
+
+CREATE INDEX IF NOT EXISTS idx_recharge_codes_status ON recharge_codes(status);
+CREATE INDEX IF NOT EXISTS idx_recharge_codes_activated_at ON recharge_codes(activated_at);
+CREATE INDEX IF NOT EXISTS idx_recharge_codes_redeemed_at ON recharge_codes(redeemed_at);
+CREATE INDEX IF NOT EXISTS idx_recharge_codes_redeemed_by ON recharge_codes(redeemed_by);
+CREATE INDEX IF NOT EXISTS idx_recharge_codes_redeemed_order ON recharge_codes(redeemed_order_id);
+-- +goose StatementEnd
+
+-- +goose Down
+-- +goose StatementBegin
+DROP TABLE IF EXISTS recharge_codes;
+-- +goose StatementEnd