chore: update CHANGELOG.md to include Request ID tracing for debugging, enhancing request tracking across services, and update API client to propagate Request ID in headers

lib/utils/requestId.ts

@@ -0,0 +1,43 @@
+/**
+ * Request ID utilities for tracing API calls across services
+ * Request IDs help debug issues by correlating logs across frontend and backends
+ */
+
+const REQUEST_ID_HEADER = 'X-Request-ID'
+
+/**
+ * Generate a unique request ID
+ * Format: REQ<timestamp>_<random>
+ */
+export function generateRequestId(): string {
+  const timestamp = Date.now().toString(36)
+  const random = Math.random().toString(36).substring(2, 8)
+  return `REQ${timestamp}_${random}`
+}
+
+/**
+ * Get request ID header name
+ */
+export function getRequestIdHeader(): string {
+  return REQUEST_ID_HEADER
+}
+
+/**
+ * Store the last request ID for error reporting
+ */
+let lastRequestId: string | null = null
+
+export function setLastRequestId(id: string): void {
+  lastRequestId = id
+}
+
+export function getLastRequestId(): string | null {
+  return lastRequestId
+}
+
+/**
+ * Clear the stored request ID
+ */
+export function clearLastRequestId(): void {
+  lastRequestId = null
+}