Add public PageView tracking for portal analytics.

Closes #3 — record successful public GET hits, show last-30-day views and top pages on the analytics report, and keep portal/admin/API paths out of the counts.

site/analytics/models.py

@@ -4,6 +4,21 @@ from core.models import TimeStampedModel, UUIDPrimaryKeyModel
 from leads.models import Lead
 
 
+class PageView(UUIDPrimaryKeyModel, TimeStampedModel):
+    """One successful GET of a public marketing page."""
+
+    path = models.CharField(max_length=512, db_index=True)
+
+    class Meta:
+        ordering = ["-created_at"]
+        indexes = [
+            models.Index(fields=["created_at", "path"]),
+        ]
+
+    def __str__(self) -> str:
+        return self.path or "/"
+
+
 class UTMVisit(UUIDPrimaryKeyModel, TimeStampedModel):
     correlation_id = models.CharField(max_length=64, db_index=True)
     path = models.CharField(max_length=512, blank=True)