feat(API-11): Route API calls through AgilitonAPI gateway

Add gateway-first pattern: when AGILITON_API_KEY is set, route all
external API calls through the gateway with X-API-Key auth. Falls back
to direct API access when gateway is unavailable.

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

node_modules/hono/dist/middleware/timeout/index.js

@@ -0,0 +1,25 @@
+// src/middleware/timeout/index.ts
+import { HTTPException } from "../../http-exception.js";
+var defaultTimeoutException = new HTTPException(504, {
+  message: "Gateway Timeout"
+});
+var timeout = (duration, exception = defaultTimeoutException) => {
+  return async function timeout2(context, next) {
+    let timer;
+    const timeoutPromise = new Promise((_, reject) => {
+      timer = setTimeout(() => {
+        reject(typeof exception === "function" ? exception(context) : exception);
+      }, duration);
+    });
+    try {
+      await Promise.race([next(), timeoutPromise]);
+    } finally {
+      if (timer !== void 0) {
+        clearTimeout(timer);
+      }
+    }
+  };
+};
+export {
+  timeout
+};