[CORL-281] Metrics (#2298)

* feat: iunitial metrics implementation

* fix: graphql endpoint was throwing errors.

* feat: add metrics env variables to readme

src/types/tsscmp.d.ts

@@ -0,0 +1,3 @@
+declare module "tsscmp" {
+  export default function tsscmp(expect: string, got: string): boolean;
+}