fix(v3-vision): strict integer stripping and demo parity verification

1. Hardened all demo models to set non-string ID fields to None, ensuring full Vision Standard compliance.\n2. Added status_id_random to common field schema.\n3. Verified account_id availability in exhibit tracking.\n4. Added comprehensive E2E parity test suite for demo objects.\n5. Fixed NameError by importing root_validator.

app/models/event_exhibit_tracking_models.py

@@ -1,7 +1,7 @@
 import datetime, pytz
 
 from typing import Dict, List, Optional, Set, Union
-from pydantic import BaseModel, EmailStr, Field, Json, PrivateAttr, ValidationError, validator
+from pydantic import BaseModel, EmailStr, Field, Json, PrivateAttr, ValidationError, validator, root_validator
 
 from app.db_sql import redis_lookup_id_random
 from app.lib_general import log, logging
@@ -53,12 +53,11 @@ class Event_Exhibit_Tracking_Base(BaseModel):
         if ep_rid := values.get('event_person_id_random'): values['event_person_id'] = ep_rid
         if eb_rid := values.get('event_badge_id_random'): values['event_badge_id'] = eb_rid
             
-        # 2. Prevent "Collision Population" or leakage of integers during API responses
+        # 2. Prevent leakage of integers during API responses (Vision Standard)
         for k in ['id', 'event_exhibit_tracking_id', 'account_id', 'event_id', 'event_exhibit_id', 'event_person_id', 'event_badge_id']:
             val = values.get(k)
             if val is not None and not isinstance(val, str):
-                if values.get(f'{k}_random') or (k=='id' and values.get('id_random')):
-                    del values[k]
+                values[k] = None
                 
         return values