fix: correct Company model field references in get_company_context

Use category relationship (company.category.name) instead of non-existent
direct attribute, and description_full/description_short instead of
non-existent description/short_description fields.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

services/social_publisher_service.py

@@ -417,11 +417,14 @@ class SocialPublisherService:
             company = db.query(Company).filter(Company.id == company_id).first()
             if not company:
                 return {}
+            category_name = ''
+            if company.category_id and company.category:
+                category_name = company.category.name
             return {
                 'company_name': company.name or '',
-                'category': company.category or '',
+                'category': category_name,
                 'city': company.address_city or 'Wejherowo',
-                'description': company.description or company.short_description or '',
+                'description': company.description_full or company.description_short or '',
                 'website': company.website or '',
             }
         finally: