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/worker/src/index.ts

@@ -6,7 +6,7 @@ const redisUrl = process.env.REDIS_URL ?? "redis://localhost:6379";
 const connection = new IORedis(redisUrl, { maxRetriesPerRequest: null });
 
 const worker = new Worker(
-  "codeboard:generate",
+  "codeboard-generate",
   async (job) => {
     console.log(`[worker] Processing job ${job.id}: ${job.data.repoUrl}`);
     return processGenerationJob(job);
@@ -28,7 +28,7 @@ worker.on("failed", (job, err) => {
 });
 
 worker.on("ready", () => {
-  console.log("[worker] Ready and waiting for jobs on codeboard:generate");
+  console.log("[worker] Ready and waiting for jobs on codeboard-generate");
 });
 
 async function shutdown() {