feat: Implement Event File Hosted Data Fix and API Guide Update

Address critical data visibility issues for Event Files and enhance frontend documentation.

This commit resolves the persistent problem where top-level hosted file convenience fields
(e.g., , , ) were
returning as  in V3 Event File API responses, even when .

Key changes include:
- Refactored  Pydantic model:
    - Removed redundant  definitions from top-level hosted file convenience fields,
      allowing direct mapping from SQL view columns.
    - Simplified  to focus solely on conditionally loading the nested
       object, as top-level fields are now populated directly by Pydantic
      from the  view.
    - Added comprehensive comments to clarify data flow, Pydantic's behavior, and the
      expected origin of these convenience fields from SQL views.
- Updated :
    - Introduced a new section detailing how to retrieve Event File data, including the
      use of  to get both top-level convenience fields and a nested
       object.
    - Clarified all ID references as random string IDs.
    - Renumbered the troubleshooting section.
- Copied updated guide to .
- Continued ID Vision compliance audit, ensuring consistent handling of random string IDs
  across various core and event models (Account, Address, Contact, DataStore, Event Badge Template).
- Consolidated ID Vision E2E tests and updated related documentation.
- Minor updates to  and
  to support Event File data retrieval with .

app/object_definitions/events_registration.py

@@ -48,9 +48,9 @@ events_registration_obj_li = {
         'base_name': Event_Badge_Template_Base,
         # V3 Search Security:
         'searchable_fields': [
-            'id', 'event_badge_template_id', 'event_id',
-            'id_random', 'event_badge_template_id_random', 'event_id_random', 'name',
-            'description', 'layout', 'notes', 'enable',
+            'id', 'event_badge_template_id', 'event_id', 'account_id',
+            'id_random', 'event_badge_template_id_random', 'event_id_random', 'account_id_random',
+            'name', 'description', 'layout', 'notes', 'enable',
             'created_on', 'updated_on'
         ],
     },