Add Hatchet workflow stubs for order and referral jobs

src/workflows/referral-balance-sync.js

@@ -0,0 +1,38 @@
+import { hatchet } from '../hatchet-client.js';
+import { requestBackendGraphQL } from '../fregat-backend-client.js';
+
+export const referralBalanceSync = hatchet.workflow({
+  name: 'fregat-referral-balance-sync',
+});
+
+referralBalanceSync.task({
+  name: 'sync-referral-balance',
+  fn: async (input) => {
+    const userId = String(input.userId || '');
+    if (!userId) {
+      throw new Error('userId is required for referral sync');
+    }
+
+    const data = await requestBackendGraphQL({
+      userId,
+      query: `
+        query ReferralStats {
+          referralStats {
+            referrerId
+            availableBalance
+            referralsCount
+          }
+        }
+      `,
+    });
+
+    const stats = data.referralStats;
+    console.log(`[fregat-referral-balance-sync] user=${stats.referrerId} balance=${stats.availableBalance} referrals=${stats.referralsCount}`);
+
+    return {
+      referrerId: stats.referrerId,
+      availableBalance: stats.availableBalance,
+      referralsCount: stats.referralsCount,
+    };
+  },
+});