feat: add BullMQ ingest queue and processor

Idempotent message persistence via prisma.message.upsert. Uses URL parsing
to pass connection options to BullMQ, avoiding ioredis version conflicts.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/worker/src/queues/ingest.processor.ts

@@ -1,6 +1,11 @@
 import { Worker } from 'bullmq';
 import { IngestJobData } from '@tower/types';
 
+function parseRedisUrl(url: string) {
+  const { hostname, port } = new URL(url);
+  return { host: hostname, port: parseInt(port || '6379', 10), maxRetriesPerRequest: null };
+}
+
 export async function processIngestJob(job: IngestJobData, prisma: any): Promise<void> {
   await prisma.message.upsert({
     where: {
@@ -24,10 +29,9 @@ export async function processIngestJob(job: IngestJobData, prisma: any): Promise
 }
 
 export function createIngestWorker(redisUrl: string, prisma: any): Worker<IngestJobData> {
-  const connection = { host: 'localhost', port: 6379, maxRetriesPerRequest: null } as any;
   return new Worker<IngestJobData>(
     'tower:ingest',
     async (job) => processIngestJob(job.data, prisma),
-    { connection },
+    { connection: parseRedisUrl(redisUrl) },
   );
 }