Populate the client website template with catalog feature flags.

Extract always-on public/portal/UTM plus optional email_sms, directmail, blog, payments, social, and social_ai so new client sites can be bootstrapped from this seed.

Refs #1
Refs #2

Co-authored-by: Cursor <cursoragent@cursor.com>

site/core/models.py

@@ -0,0 +1,52 @@
+import uuid
+
+from django.conf import settings
+from django.db import models
+
+
+class TimeStampedModel(models.Model):
+    """Abstract base with created/updated timestamps."""
+
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        abstract = True
+
+
+class UUIDPrimaryKeyModel(models.Model):
+    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
+
+    class Meta:
+        abstract = True
+
+
+class StoredFile(UUIDPrimaryKeyModel, TimeStampedModel):
+    """Binary file blob in the database (no filesystem media storage)."""
+
+    class Kind(models.TextChoices):
+        CAMPAIGN_IMAGE = "campaign_image", "Campaign image"
+        SOCIAL_IMAGE = "social_image", "Social image"
+        SOCIAL_VIDEO = "social_video", "Social video"
+        INVOICE_PDF = "invoice_pdf", "Invoice PDF"
+
+    kind = models.CharField(
+        max_length=32, choices=Kind.choices, default=Kind.CAMPAIGN_IMAGE
+    )
+    filename = models.CharField(max_length=255, blank=True)
+    content_type = models.CharField(max_length=128)
+    size = models.PositiveIntegerField(default=0)
+    data = models.BinaryField()
+    uploaded_by = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        null=True,
+        blank=True,
+        on_delete=models.SET_NULL,
+        related_name="uploaded_files",
+    )
+
+    class Meta:
+        ordering = ["-created_at"]
+
+    def __str__(self) -> str:
+        return self.filename or str(self.pk)