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/adapter/service-worker/handler.js

@@ -0,0 +1,20 @@
+// src/adapter/service-worker/handler.ts
+var handle = (app, opts = {
+  // To use `fetch` on a Service Worker correctly, bind it to `globalThis`.
+  fetch: globalThis.fetch.bind(globalThis)
+}) => {
+  return (evt) => {
+    evt.respondWith(
+      (async () => {
+        const res = await app.fetch(evt.request, {}, evt);
+        if (opts.fetch && res.status === 404) {
+          return await opts.fetch(evt.request);
+        }
+        return res;
+      })()
+    );
+  };
+};
+export {
+  handle
+};

node_modules/hono/dist/adapter/service-worker/index.js

@@ -0,0 +1,11 @@
+// src/adapter/service-worker/index.ts
+import { handle } from "./handler.js";
+var fire = (app, options = {
+  fetch: void 0
+}) => {
+  addEventListener("fetch", handle(app, options));
+};
+export {
+  fire,
+  handle
+};