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/get-intrinsic/.eslintrc

@@ -0,0 +1,42 @@
+{
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+
+	"extends": "@ljharb",
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+	"env": {
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+	"globals": {
+		"Float16Array": false,
+	},
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+	"rules": {
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+		"complexity": 0,
+		"eqeqeq": [2, "allow-null"],
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+	"overrides": [
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+			"rules": {
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+}