fix: rename BullMQ queue to avoid colon (not allowed in newer versions)

- codeboard:generate → codeboard-generate in worker and web
- Update docker-compose: remove postgres (unused), use non-conflicting ports
- Exclude tests/ from Docker build context

apps/web/src/lib/queue.ts

@@ -5,7 +5,7 @@ let queue: Queue | null = null;
 
 export function getQueue(): Queue {
   if (!queue) {
-    queue = new Queue("codeboard:generate", {
+    queue = new Queue("codeboard-generate", {
       connection: getRedis(),
     });
   }