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/zod-to-json-schema/dist/cjs/parsers/catch.js

@@ -0,0 +1,8 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.parseCatchDef = void 0;
+const parseDef_js_1 = require("../parseDef.js");
+const parseCatchDef = (def, refs) => {
+    return (0, parseDef_js_1.parseDef)(def.innerType._def, refs);
+};
+exports.parseCatchDef = parseCatchDef;