feat: derive event lifecycle status from dates and flags

Replace persisted event statuses with publication and cancellation flags, and compute public lifecycle labels from event timing and registration capacity. Keep filters, registration checks, and profile responses aligned with the derived status.

apps/events/api/schemas.py

@@ -56,6 +56,9 @@ class EventSchema(ModelSchema):
     absolute_featured_image_url: Optional[str] = None
     absolute_featured_image_thumbnail_url: Optional[str] = None
     absolute_featured_image_preview_url: Optional[str] = None
+    status: str
+    status_label: str
+    effective_registration_end_date: datetime
 
     class Meta:
         model = Event
@@ -63,7 +66,8 @@ class EventSchema(ModelSchema):
             'id', 'title', 'slug', 'description', 'featured_image', 'event_type',
             'address', 'location', 'online_link', 'start_time', 'end_time',
             'registration_start_date', 'registration_end_date', 'registration_success_markdown',
-            'capacity', 'price', 'status', 'created_at', 'updated_at'
+            'capacity', 'price', 'is_published',
+            'is_cancelled', 'created_at', 'updated_at'
         ]
 
     @staticmethod
@@ -87,6 +91,8 @@ class EventSchema(ModelSchema):
 
     @staticmethod
     def resolve_registration_count(obj):
+        if hasattr(obj, "browse_registration_count"):
+            return obj.browse_registration_count
         now = timezone.now()
         return obj.registrations.filter(is_deleted=False).filter(
             Q(status__in=[Registration.StatusChoices.CONFIRMED, Registration.StatusChoices.ATTENDED])
@@ -113,9 +119,13 @@ class EventListSchema(Schema):
     end_time: datetime
     registration_start_date: Optional[datetime] = None
     registration_end_date: Optional[datetime] = None
+    effective_registration_end_date: datetime
     capacity: Optional[int] = None
     price: Optional[float] = None
     status: str
+    status_label: str
+    is_published: bool
+    is_cancelled: bool
     registration_count: int
     created_at: datetime
 
@@ -172,7 +182,8 @@ class EventCreateSchema(Schema):
     registration_end_date: Optional[datetime] = None
     capacity: Optional[int] = None
     price: Optional[float] = None
-    status: str = "draft"
+    is_published: bool = False
+    is_cancelled: bool = False
     registration_success_markdown: Optional[str] = None
     gallery_image_ids: Optional[List[int]] = []
 
@@ -191,7 +202,8 @@ class EventUpdateSchema(Schema):
     registration_end_date: Optional[datetime] = None
     capacity: Optional[int] = None
     price: Optional[float] = None
-    status: Optional[str] = None
+    is_published: Optional[bool] = None
+    is_cancelled: Optional[bool] = None
     registration_success_markdown: Optional[str] = None
     gallery_image_ids: Optional[List[int]] = None
 
@@ -344,6 +356,17 @@ class EventBriefSchema(Schema):
     slug: str
     start_date: datetime
     end_date: Optional[datetime] = None
+    start_time: datetime
+    end_time: datetime
+    registration_start_date: Optional[datetime] = None
+    registration_end_date: Optional[datetime] = None
+    effective_registration_end_date: datetime
+    capacity: Optional[int] = None
+    registration_count: int = 0
+    status: str
+    status_label: str
+    is_published: bool = True
+    is_cancelled: bool = False
     location: Optional[str] = None
     price: int
     absolute_image_url: Optional[str] = None
@@ -398,9 +421,13 @@ class RegistrationHubEventOut(Schema):
     end_time: datetime
     registration_start_date: Optional[datetime] = None
     registration_end_date: Optional[datetime] = None
+    effective_registration_end_date: datetime
     capacity: Optional[int] = None
     price: int
     status: str
+    status_label: str
+    is_published: bool
+    is_cancelled: bool
     registration_count: int
     image_url: Optional[str] = None
     registration_success_markdown: Optional[str] = None