refactoring the api endpoints to be separate files to reduce context usage

apps/server/src/routes/health/common.ts

@@ -0,0 +1,14 @@
+/**
+ * Common utilities for health routes
+ */
+
+import { createLogger } from "../../lib/logger.js";
+
+const logger = createLogger("Health");
+
+/**
+ * Get error message from error object
+ */
+export function getErrorMessage(error: unknown): string {
+  return error instanceof Error ? error.message : "Unknown error";
+}