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/@modelcontextprotocol/sdk/dist/cjs/shared/auth-utils.d.ts

@@ -0,0 +1,23 @@
+/**
+ * Utilities for handling OAuth resource URIs.
+ */
+/**
+ * Converts a server URL to a resource URL by removing the fragment.
+ * RFC 8707 section 2 states that resource URIs "MUST NOT include a fragment component".
+ * Keeps everything else unchanged (scheme, domain, port, path, query).
+ */
+export declare function resourceUrlFromServerUrl(url: URL | string): URL;
+/**
+ * Checks if a requested resource URL matches a configured resource URL.
+ * A requested resource matches if it has the same scheme, domain, port,
+ * and its path starts with the configured resource's path.
+ *
+ * @param requestedResource The resource URL being requested
+ * @param configuredResource The resource URL that has been configured
+ * @returns true if the requested resource matches the configured resource, false otherwise
+ */
+export declare function checkResourceAllowed({ requestedResource, configuredResource }: {
+    requestedResource: URL | string;
+    configuredResource: URL | string;
+}): boolean;
+//# sourceMappingURL=auth-utils.d.ts.map