feat: implement meter event processing with queue for Stripe billing

apps/api/src/jobs/worker.ts

@@ -15,6 +15,7 @@ import {createCampaignWorker} from './campaign-processor.js';
 import {createDomainVerificationWorker} from './domain-verification-processor.js';
 import {createEmailWorker} from './email-processor.js';
 import {createImportWorker} from './import-processor.js';
+import {createMeterWorker} from './meter-processor.js';
 import {createScheduledCampaignWorker} from './scheduled-processor.js';
 import {createSegmentCountWorker} from './segment-count-processor.js';
 import {createWorkflowWorker} from './workflow-processor-queue.js';
@@ -70,6 +71,11 @@ async function startWorkers() {
     workers.push({name: 'api-request-cleanup', worker: apiRequestCleanupWorker});
     signale.success('[WORKER] API request cleanup worker started');
 
+    // Start meter worker
+    const meterWorker = createMeterWorker();
+    workers.push({name: 'meter', worker: meterWorker});
+    signale.success('[WORKER] Meter worker started');
+
     signale.success('[WORKER] All workers started successfully');
   } catch (error) {
     signale.error('[WORKER] Failed to start workers:', error);