feat: add worker queue fabric — classify, dnc, p1, review, digest, thread-resolve, outbox, AI modules

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

apps/worker/src/ai/llm-client.ts

@@ -0,0 +1,33 @@
+const OPENROUTER_BASE = 'https://openrouter.ai/api/v1';
+const DEFAULT_MODEL = 'google/gemini-3.5-flash';
+
+export async function callLLM(
+  prompt: string,
+  apiKey: string,
+  model = DEFAULT_MODEL,
+): Promise<string> {
+  const res = await fetch(`${OPENROUTER_BASE}/chat/completions`, {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/json',
+      Authorization: `Bearer ${apiKey}`,
+      'HTTP-Referer': 'https://tower.insignia.app',
+      'X-Title': 'TOWER Community Platform',
+    },
+    body: JSON.stringify({
+      model,
+      messages: [{ role: 'user', content: prompt }],
+      temperature: 0.1,
+    }),
+  });
+
+  if (!res.ok) {
+    const body = await res.text().catch(() => '');
+    throw new Error(`OpenRouter error ${res.status}: ${body}`);
+  }
+
+  const data = (await res.json()) as { choices: Array<{ message: { content: string } }> };
+  const content = data.choices?.[0]?.message?.content;
+  if (!content) throw new Error('OpenRouter returned empty content');
+  return content;
+}