Migrate endorserServer.ts to Enhanced Triple Migration Pattern

- Remove databaseUtil import, replace with logger.error
- Migrate $notify to modern notify pattern with createNotifyHelpers
- Add NOTIFY_PERSONAL_DATA_ERROR constant for error messages
- Use NOTIFICATION_TIMEOUTS.STANDARD for timeouts
- All phases complete: database, SQL, notification migration
- 35 minutes, 1510 lines, high complexity service file
- Linting passes with no errors

src/constants/notifications.ts

@@ -78,6 +78,13 @@ export const NOTIFY_SERVER_ACCESS_ERROR = {
   message: "There was a problem accessing the server. Try again later.",
 };
 
+// Used in: endorserServer.ts (getHeaders function - personal data error)
+export const NOTIFY_PERSONAL_DATA_ERROR = {
+  title: "Personal Data Error",
+  message:
+    "Showing anonymous data. See the Help page for help with personal data.",
+};
+
 // Used in: [Component usage not yet documented]
 export const NOTIFY_NO_IDENTITY_ERROR = {
   title: "No Identity",