Add task queue with dedup and concurrency control

- Tasks keyed by {taskType}-{repo}-{issue} for deduplication
- Duplicate requests (pending or running) are dropped
- Configurable concurrency via QUEUE_CONCURRENCY env (default 2)
- Workspace names now {taskType}-{repo}-{issue} for observability
- GET /queue endpoint shows pending/running tasks
- All handlers route through the queue instead of calling Coder directly

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

src/index.ts

@@ -6,6 +6,7 @@ import cron from "node-cron";
 import { loadConfig } from "./config.js";
 import { CoderClient } from "./services/coder.js";
 import { GiteaClient } from "./services/gitea.js";
+import { TaskQueue } from "./queue.js";
 
 import { issueTriage } from "./handlers/issue-triage.js";
 import { issueLabel } from "./handlers/issue-label.js";
@@ -23,26 +24,30 @@ const config = loadConfig();
 const coderClient = new CoderClient(config);
 const giteaClient = new GiteaClient(config);
 
+const concurrency = parseInt(process.env.QUEUE_CONCURRENCY || "2", 10);
+const queue = new TaskQueue(coderClient, giteaClient, concurrency);
+
 const app = new Hono();
 app.use("*", logger());
 
 // ---------------------------------------------------------------------------
-// Health check
+// Health check + queue status
 // ---------------------------------------------------------------------------
 
 app.get("/health", (c) => c.json({ status: "ok" }));
+app.get("/queue", (c) => c.json(queue.status()));
 
 // ---------------------------------------------------------------------------
 // Webhook endpoints — same paths as the n8n webhooks so Gitea config
 // can stay unchanged (just point to new host).
 // ---------------------------------------------------------------------------
 
-app.post("/webhook/gitea-issue-triage", issueTriage(config, coderClient, giteaClient));
-app.post("/webhook/gitea-issue-label", issueLabel(config, coderClient, giteaClient));
-app.post("/webhook/gitea-issue-comment", issueComment(config, coderClient));
-app.post("/webhook/gitea-pr-review", prReview(config, coderClient, giteaClient));
-app.post("/webhook/gitea-pr-review-rework", prRework(config, coderClient, giteaClient));
-app.post("/webhook/gitea-release", release(config, coderClient, giteaClient));
+app.post("/webhook/gitea-issue-triage", issueTriage(config, queue));
+app.post("/webhook/gitea-issue-label", issueLabel(config, queue));
+app.post("/webhook/gitea-issue-comment", issueComment(config, queue));
+app.post("/webhook/gitea-pr-review", prReview(config, queue, giteaClient));
+app.post("/webhook/gitea-pr-review-rework", prRework(config, queue));
+app.post("/webhook/gitea-release", release(config, queue));
 
 // ---------------------------------------------------------------------------
 // Scheduled maintenance cron (Monday 9:00 AM)
@@ -50,7 +55,7 @@ app.post("/webhook/gitea-release", release(config, coderClient, giteaClient));
 
 const maintenanceRepos = parseMaintenanceRepos();
 if (maintenanceRepos.length > 0) {
-  const maintenanceFn = runMaintenance(config, coderClient, maintenanceRepos);
+  const maintenanceFn = runMaintenance(config, queue, maintenanceRepos);
 
   cron.schedule("0 9 * * 1", () => {
     console.log("[cron] running weekly maintenance");
@@ -69,7 +74,7 @@ if (maintenanceRepos.length > 0) {
 // ---------------------------------------------------------------------------
 
 serve({ fetch: app.fetch, port: config.port }, (info) => {
-  console.log(`SDLC Orchestrator listening on :${info.port}`);
+  console.log(`SDLC Orchestrator listening on :${info.port} (concurrency: ${concurrency})`);
 });
 
 // ---------------------------------------------------------------------------