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/merge-descriptors/package.json

@@ -0,0 +1,50 @@
+{
+	"name": "merge-descriptors",
+	"version": "2.0.0",
+	"description": "Merge objects using their property descriptors",
+	"license": "MIT",
+	"repository": "sindresorhus/merge-descriptors",
+	"funding": "https://github.com/sponsors/sindresorhus",
+	"contributors": [
+		"Jonathan Ong <me@jongleberry.com>",
+		"Douglas Christopher Wilson <doug@somethingdoug.com>",
+		"Mike Grabowski <grabbou@gmail.com>",
+		"Sindre Sorhus <sindresorhus@gmail.com>"
+	],
+	"exports": {
+		"types": "./index.d.ts",
+		"default": "./index.js"
+	},
+	"main": "./index.js",
+	"types": "./index.d.ts",
+	"sideEffects": false,
+	"engines": {
+		"node": ">=18"
+	},
+	"scripts": {
+		"test": "xo && ava"
+	},
+	"files": [
+		"index.js",
+		"index.d.ts"
+	],
+	"keywords": [
+		"merge",
+		"descriptors",
+		"object",
+		"property",
+		"properties",
+		"merging",
+		"getter",
+		"setter"
+	],
+	"devDependencies": {
+		"ava": "^5.3.1",
+		"xo": "^0.56.0"
+	},
+	"xo": {
+		"rules": {
+			"unicorn/prefer-module": "off"
+		}
+	}
+}