done

app/api/dev.py

@@ -7,7 +7,7 @@ from datetime import datetime, timezone
 from fastapi import APIRouter, BackgroundTasks, Depends
 from sqlalchemy.ext.asyncio import AsyncSession
 from app.database import get_db, AsyncSessionLocal
-from app.models import Post
+from app.models import Post, iso_utc
 from app.ws.manager import manager
 import hashlib, time
 
@@ -45,7 +45,7 @@ async def insert_fake_post(
             "id": post.id,
             "text": post.text,
             "source": post.source,
-            "published_at": post.published_at.isoformat(),
+            "published_at": iso_utc(post.published_at),
             "sentiment": post.sentiment,
             "ai_confidence": post.ai_confidence,
             "relevant": post.relevant,