Add getAddActivityPrePopulate handler and implement prepopulate data retrieval

- Introduced a new handler for adding activity prepopulation.
- Enhanced the PrePopulateService to fetch all necessary prepopulate data for the new activity.
- Updated the updateBankDetails handler to correctly inject host ID.
- Improved user data retrieval in HostService to include additional fields.
- Added validation for host ID in showSuggestionToAM handler.

src/modules/minglaradmin/handlers/hosthub/onboarding/showSuggestionToAM.ts

@@ -26,6 +26,13 @@ export const handler = safeHandler(async (
 
   const hostXid = Number(event.pathParameters?.hostXid)
 
+  if (!hostXid) {
+    throw new ApiError(
+      400,
+      'Host ID is required in path parameters.',
+    );
+  }
+
   // Get suggestions using service
   const suggestions = await minglarService.getSuggestionsForAM(hostXid);