feat(hotelGroups): add offer display fields and related logic

- Add new database columns (coverImage, priceAmount, priceUnit, tags, status) to HotelGroup model
- Create hotel_group_dict serializer to handle image/coverImage synchronization and tag formatting
- Update site config endpoints to use the new serializer and filter published hotel groups
- Add Alembic migration for the new database schema changes
- Update test fixtures and API contract tests for the new fields
- Revise public and admin API documentation to document the new hotel group fields and usage rules

app/routers/shared.py

@@ -2,7 +2,7 @@ from sqlalchemy import select
 from sqlalchemy.orm import Session, selectinload
 from ..models import Campaign, CtaBanner, Destination, HeroSlide, HotelGroup, MapImage, ThemeCard, VehicleOption
 from ..route_sections import route_section_dict, route_section_query
-from ..serializers import destination_dict, model_dict
+from ..serializers import destination_dict, hotel_group_dict, model_dict
 
 
 def site_config(db: Session, active_only: bool, include_public_extras: bool = True) -> dict:
@@ -19,7 +19,7 @@ def site_config(db: Session, active_only: bool, include_public_extras: bool = Tr
         map_stmt = map_stmt.where(MapImage.isActive.is_(True))
         theme_stmt = theme_stmt.where(ThemeCard.isActive.is_(True))
         cta_stmt = cta_stmt.where(CtaBanner.isActive.is_(True))
-        hotel_stmt = hotel_stmt.where(HotelGroup.isActive.is_(True))
+        hotel_stmt = hotel_stmt.where(HotelGroup.isActive.is_(True), HotelGroup.status == "published")
         vehicle_stmt = vehicle_stmt.where(VehicleOption.isActive.is_(True))
 
     hero_slides = db.scalars(hero_stmt).all()
@@ -41,6 +41,6 @@ def site_config(db: Session, active_only: bool, include_public_extras: bool = Tr
             route_sections = [section for section in route_sections if section.isActive]
         result["campaigns"] = [model_dict(item) for item in campaigns]
         result["routeSections"] = [route_section_dict(item, public=True) for item in route_sections]
-        result["hotelGroups"] = [model_dict(item) for item in db.scalars(hotel_stmt).all()]
+        result["hotelGroups"] = [hotel_group_dict(item) for item in db.scalars(hotel_stmt).all()]
         result["vehicleOptions"] = [model_dict(item) for item in db.scalars(vehicle_stmt).all()]
     return result