refactor: rename email-server-worker to email-worker

Rename directory from email-server-worker to email-worker for clarity and brevity. Update all references in CLAUDE.md documentation.

email-worker/src/healthcheck.ts

@@ -0,0 +1,29 @@
+import { createLogger } from "./lib/logger";
+
+import http, { IncomingMessage } from "http";
+const logger = createLogger("server:healthcheck");
+
+const options = {
+    host: "localhost",
+    port: "3000",
+    timeout: 2000,
+    path: '/healthcheck/'
+};
+
+const request = http.request(options, (res:IncomingMessage) => {
+
+    logger(`Healthcheck: STATUS ${res.statusCode}`);
+
+    if (res.statusCode == 200) {
+        process.exit(0);
+    } else {
+        process.exit(1);
+    }
+});
+
+request.on("error", function (err:any) {
+    logger("Healthcheck: ERROR");
+    process.exit(1);
+});
+
+request.end();