fix(v3-vision): platform-wide hardening of ID Vision models

Hardened root_validators in Journal, Post, Page, and Hosted File models to use Union[int, str] for Vision ID fields. This prevents resolved integer IDs from being deleted during CREATE/UPDATE operations, resolving a critical regression found during Post Comment bug fixing.

app/models/hosted_file_models.py

@@ -67,21 +67,24 @@ class Hosted_File_Base(BaseModel):
     def map_v3_ids(cls, values):
         """
         Vision Transformer:
-        Map DB keys to clean API keys and strip internal integers.
+        Map DB keys to clean API keys and strip internal integers during READ operations.
+        During CREATE (POST) operations, we ensure resolved integers are preserved.
         """
-        # 1. Capture the random ID string
+        # 1. Map Random Strings to Clean Names
         rid = values.get('id_random') or values.get('hosted_file_id_random')
-            
-        # 2. Map Random Strings to Clean Names for the Frontend
-        # We always want the string version in 'id' and 'hosted_file_id' for the API response
-        if rid:
+        if rid and isinstance(rid, str):
             values['id'] = rid
             values['hosted_file_id'] = rid
             
-        if a_rid := values.get('account_id_random'):
-            # If we have a random account ID string, use it for the Vision API
-            values['account_id'] = a_rid
+        if a_rid := values.get('account_id_random'): values['account_id'] = a_rid
             
+        # 2. Prevent "Collision Population" or leakage of integers during API responses
+        for k in ['id', 'hosted_file_id', 'account_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]
+                
         return values
 
     class Config: