fix(admin): Naprawiono błąd importu w SSE scraping endpoint

Problem: Podwójny import ZOPKContentScraper powodował błąd 'cannot access local variable'
Rozwiązanie: Przeniesiono import na początek funkcji generate()

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app.py

@@ -11212,36 +11212,20 @@ def admin_zopk_scrape_content_stream():
 
     def generate():
         import json
-        from dataclasses import asdict
+        import time
+        from zopk_content_scraper import ZOPKContentScraper, MAX_RETRY_ATTEMPTS
+        from database import ZOPKNews
 
         db = SessionLocal()
         try:
             scraper = ZOPKContentScraper(db, user_id=user_id)
 
-            def progress_callback(update):
-                data = asdict(update)
-                yield f"data: {json.dumps(data, ensure_ascii=False)}\n\n"
-
-            # This won't work with generator, need different approach
-            # Use a queue-based approach instead
-
-            progress_updates = []
-
-            def queue_callback(update):
-                progress_updates.append(update)
-
-            # Run in this thread, yielding updates as they come
-            from zopk_content_scraper import ZOPKContentScraper, ProgressUpdate
-            import time
-
             # Get articles to scrape
-            from database import ZOPKNews
             query = db.query(ZOPKNews).filter(
                 ZOPKNews.status.in_(['approved', 'auto_approved'])
             )
 
             if not force:
-                from zopk_content_scraper import MAX_RETRY_ATTEMPTS
                 query = query.filter(ZOPKNews.scrape_status.in_(['pending', 'failed']))
                 query = query.filter(
                     (ZOPKNews.scrape_status == 'pending') |