treewide: make less webhook-centric

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: Ifab58fcb523549ca9cb83dc8467be51e6a6a6964

src/index.ts

@@ -10,6 +10,7 @@ import {
 } from './github.js';
 import { createApp } from './server.js';
 import { createEngine } from './engine/index.js';
+import { startPolling } from './polling.js';
 import type { WebhookEvent } from './types.js';
 
 async function analyzeOne(target: string) {
@@ -95,7 +96,9 @@ function serve() {
     );
   }
   if (!process.env.WEBHOOK_SECRET) {
-    logger.warn('No WEBHOOK_SECRET - webhook signature verification is disabled');
+    logger.warn(
+      'No WEBHOOK_SECRET - webhook signature verification is disabled (not needed for polling-only mode)'
+    );
   }
 
   const app = createApp(config);
@@ -105,7 +108,7 @@ function serve() {
     .filter(([, v]) => v.enabled)
     .map(([k]) => k);
 
-  const server = app.listen(port, () => {
+  const server = app.listen(port, async () => {
     logger.info(`Troutbot listening on port ${port}`);
     logger.info(`Enabled backends: ${enabledBackends.join(', ')}`);
 
@@ -138,6 +141,9 @@ function serve() {
     logger.info(`Comment updates: ${config.response.allowUpdates ? 'enabled' : 'disabled'}`);
 
     logger.info(`Dashboard available at http://localhost:${port}/dashboard`);
+
+    // Start polling if enabled
+    await startPolling(config);
   });
 
   function shutdown(signal: string) {